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I ’-, <, . . . ..:,’, BULLETIN OF THE CALIFORNIA SURVEY VOLUME 18

THE OF Exclusive of Subfamilies and Stomoxyinae

BY H. C. HUCKETT

UNIVERSIN OF CALIFORNIA PRESS THE MUSCIDAE OF CALIFORNIA Exclusive of Subfamilies Muscinae and Stomoxyinae BULLETIN OF THE CALIFORNIA INSECT SURVEY VOLUME 18

THE MUSCIDAE OF CALIFORNIA Exclusive of Subfamilies Muscinae and Stomoxyinae

BY H. C. HUCKETT (Long Island Vegetable Research Farm, Riverhead, New York)

UNIVERSITY OF CALIFORNIA PRESS BERKELEY LONDON BULLETIN OF THE CALIFORNIA INSECT SURVEY

Advisory Editors: H. V. Daly, J. A. Powell, J. N. Belkin, R. M. Bohart, R. L. Doutt, D. P. Furman, J. D. Pinto, E. I. Schlinger, R. W. Thorp

VOLUME 18

Approved for publication September 21, 1973

Issued May 2, 1975

UNIVERSITY OF CALIFORNIA PRESS BERKELEY AND LOS ANGELES

UNIVERSITY OF CALIFORNIA PRESS, LTD. LONDON, ENGLAND

ISBN: 0-520-09508-1 LIBRARY OF CONGRESS CATALOG CARD NUMBER: 73-620214

01975 By The Regents of the University of California Printed by Offset in the of America THE MUSCIDAE OF CALIFORNIA Exclusive of Subfamilies Muscinae and Stomoxyinae

BY H. C. HUCKETT

INTRODUCTION

The following review of the Muscidae of California 12:2). However, it was decided to present the data was carried on concurrently with the recent survey more briefly for this volume, as follows. For of the family (Bull. Calif. Insect with about 30 records or fewer, full data Surv., Vol. 12), to which the Muscidae are closely are given, sometimes supplemented by a map. For linked. The richness of the muscid fauna in Cali- species with more records, no raw data are given. fornia was much in evidence as indicated by the A statement summarizing biogeographical and sea- abundance of material made available for study. sonal patterns and usually a map of localities are Eldridge and James (1957) have already discussed provided. (Sometimes reference to a map of a re- the species belonging to the subfamilies Muscinae lated species with similar distribution suffices.) and S t omoxyinae , All maps and the seasonal geographical summaries The writer wishes to acknowledge his indebted- in this bulletin have been prepared by J. A. ness to those in charge of these collections for Powell, University of California, Berkeley. The assistance and cooperation, without which this sur- original data from specimens representing those vey would have been inordinately curtailed. The species for which data are not given in the text names of institutions and individuals that are on file with the California Insect Survey, have permitted the use of their material in this University of California, Berkeley, and can be made manner have been referred to in the text by abbre- available on request . viations already explained in the survey series The name Muscidae for the family as here treat- dealing with the Anthomyiidae of California ed supplants in part the name Anthomyiidae sens. (Nuckett , 1971). Zat. (Aldrich, 1905; Stein, 1907, 1919; Malloch, It was originally planned to treat collection 1918, 1920) and is restricted to those species data for the muscids in the same form as was done that are mentioned in which the wing vein 1st A + for the Anthomyiidae (see Bull. Calif. Insect Surv. Cuz (sixth long vein) in the imago or adult is ob-

1 2 BuLZetin of the California Insect Survey

solescent or disappears before reaching the wing es, sedges, and herbage found in the locality, par- margin, as distinct from its continuity in the fam- ticularly that surrounding ponds and , in swamps ily Anthomyiidae (Roback, 1951; Hennig, 1965; Stone or along coasts. Adults are known to be preda- et al., 1965). In this sense the family Muscidae ceous on nematocerous or even larger Diptera is strictly limited as apart from its adoption to as in the case of tigrina (Fabricius). include both categories (Curran, 1934; SGguy, 1937; Larvae are recorded as living in humid soil in Malloch, 1921 as Muscaridae; Van Emden 1941; such areas, feeding on organic matter, or are zoo- Ringdahl, 1954; Huckett, 1965). Cole and Schlinger phagous. (19691, in their comprehensive treatise on the flies Adults of the genera , Lispaides, Spilo- of western North America, have classified the vari- gom, and Limophora are regarded as riparian in ous scatophagid, anthomyiid, and muscid aggregates their proclivities, frequenting rocks and vegeta- under the names Scatophagidae, Anthomyiidae, and tion beside streams, lakes, ponds, and rivers. A Muscidae respectively, retaining the latter name few are known to inhabit locations along the coast. for the concept of the family as adopted in large In many instances adults have been found to be pre- measure by Aldrich (1905) and Williston (1908), and daceous on nematocerous flies, and the larvae to in a more restricted sense by Brues, Melander, and be aquatic or semiaquatic, living in and algae Carpenter (1954). The Anthomyiidae and Muscidae may and pupating in the watery subsoil or shallows. both be separated from the remaining families of The Gymnodia in contrast is mainly copropha- by the absence of hypopleural bristles. gous; the adults frequent poultry yards and the The present survey of the Muscidae records the excrement of and man for purposes of ovi- presence of 36 genera, 7 subgenera, and 248'species position and larval nourishment. and subspecies. Species included in keys and text Species belonging to the subfamily that are not recognized as occurring in California commonly occur in fields and woodlands where humid- have been marked with an asterisk. These have been ity is sustained and in habitats that range from mentioned because they may be found later to occur lowlands to boreal in nature. Adults are known to within the state. occur on the trunks and foliage of shrubs and trees where they feed on the sap or on the exudation from aphids, on the developing flowers, or on the forest With few exceptions, the life histories of the nu- floor whilst seeking sites for oviposition. Lar- merous species comprising the family, as here de- vae are recorded as saprophagous, having been rear- limited, are little known. Few, if any, have become ed from fungi, rotting wood, or decomposed vegeta- commercially harmful to agricultural crops in Cali- tion, and as being coprophagous, developing in the fornia. Certain species, notably in the adult later to become zoophagous. The larvae of stage, may be considered on occasion to be a nui- meditabwlda (Fabricius) have been reared sance to man and beast by their annoying attention, from the dung of sheep, horses, and cattle, and e.g., meteorica (Linnaeus) , benja- from the feces of human beings. mini Malloch, whilst others are a hazard to public Adults of the Fanniinae are often seen hovering health due to their breeding under conditions un- or dancing under branches or the shade of trees, sanitary to man and for being vectors of pathogenic in garden or woods. They are known to feed on the organisms, e.g., Fannia scalaris (Fabricius), F. sap of plants and the exudation of aphid colonies, canicukwis (Linnaeus) , Mmcina stabulans (Fallkn) . and are frequently met with on the flowers of Com- Adults of the subfamily are generally positae and Umbelliferae. Adults of Fannia benja- regarded as inhabitants of grasses and related mini have been known, on occasion, to cause con- plants, and they may be taken by sweeping the grass- siderable annoyance to human beings by persistent- Huckett: The Muscidae of California 3 ly flying around the face seeking to alight to feed pings of animals. The larvae of Pseudophaonia are on perspiration and the secretions of eyes, ears, regarded as coprophagous. Adults of Dendrophaonia lips, and nostrils. Adults of F. eanicutaris are are found often on tree trunks, and are known to recorded as frequenting buildings for domestic feed on the exuding sap. Larvae have been bred from animals and for human habitation. Larvae breed in loose bark and the decayed trunks of trees; also in a wide variety of habitats and media, including the case of D. querceti (Bouchg) from the dung of several species of fungi and the decay and litter horses, excrement of humans, and from the nests of on the forest floor, from plant and matter hornets, bats and various birds. Adults belonging as old stumps and trunks of fallen trees, from to the genus 68116. str. are mostly inhabi- dead , dead snails and , the de- tants of forests and woods, being seen frequently tritus from nests of birds and certain rodents and on trunks of trees, on forest litter, the blossoms squirrels, and the decaying organic matter in nests of- flowers and shrubs, and occasionally beside beds of wasps and bees. Larvae also breed on the excre- of moss. Larvae have been bred from fungi, Boletus, ment and manure of domestic animals, from the excre- AhZ’Laria, PoZypomcs, droppings of animals, decay- ta found in cesspools and latrines, and from human ed or rotting wood, and the bark of fallen or stand- feces. Larvae of Fannia scakzris and F. ~ranirmkds ing trees. In the last group mentioned, larvae be- have been recognized as incidentally involved in longing to the harti-group have been found to be cases of in man. predaceous on other insects, including larvae of The habits of the also vary and dif- Dendroctonus monticolae Hopkins, and are regarded fer widely. Adults of certain species of Hydpotaea as capable of subsisting also on the sap of trees. are known to possess the hovering or dancing flight The species P. tipuzivora Malloch has been reared of certain species of Fannia, and also to be an from a tipulid found in Maryland, and several annoyance to man and cattle in their attempts to European species belonging to the genus have been alight on the face for nourishment. Larvae have recorded as probably carnivorous in the larval bred on manure, feces of domestic animals (herbi- stage. The genus , as exemplified by the vores) and man, and nests of birds and of squirrels. species M. ass-h$ZiS (Fallen) and M. stabulans, They are regarded as saprophytic and zoophagous. are in part saprophagous, copraphagous, and zo- Larvae of Hydrotcsea rneteorica are recorded as being ophagus, larvae having been bred from a wide incidentally involved in cases of myiasis in man variety of media, notably decomposing vegetable and and dysentery in children. Adults of the genus animal matter in dumps and field, and from animal Ophym frequent dumps containing animal or vegetable excrement. Adults of stabutm are known to fre- refuse to oviposit. The larvae breed in such loca- quent buildings for animals and man to gain shelter, tions and are considered to be scavengers. Larvae for purposes of oviposition, and in search of food of 0. leucostoma (Wiedemann) have also been reared and are thus capable of becoming agents for the from corpses and the dung of animals, from cesspools, transfer and the incidence of disease in man, in- dead grasshoppers, and the nests of birds, and the cluding intestinal myiases. larvae of 0. aenescem (Wiedemann) from decaying meat. Species belonging to the genera Pogonomyia, Eupogonomyia, Lasiops, and Pseuhphaonia are mainly alpine or boreo-alpine in their distribution. A- dults are met with on the foliage of conifers and on the blossoms of the various alpine flora. Adults of Alloeosty lus diaphanus (Wiedemann) are recorded also as occurring on the trunks of trees and on the drop- SYSTEMATIC TREATMENT

KEY TO SUBFAMILIES OF MUSCIDAE IN CALIFORNIA Two or more pairs of presutural dorso- 1. Anal vein 2nd A (seventh long vein) cur- central bristles present, anterior ved around apex of vein Cu.2 + 1st A pair more than half the length of (sixth long vein), and so directed as posterior pair ...... 5 to cross or meet the course of Cu.2 + 5. Sternopleural bristles typically ar- 1st A if extended to wing margin . . ranged in form of an equilateral Fanniinae triangle, or nearly so ...... Anal vein not so curved nor directed Coenosiinae p. p. across the course of vein Cu.2 + Sternopleural bristles not arrnaged 1st A ...... 2 as an equilateral triangle . . . 6 2. Vein Cu.2 + 1st A (sixth long vein) 6. strongly chitinized and continuous or traceable to wing stout basad, tapering and slender margin , ...... Family Anthomyiidae as if for piercing, labellum atro- Vein Cu. 2 + 1st A not continuous nor phied, arista plumose above and bare traceable to wing margin . . . . . 3 or nearly so below . . . . . Stomoxyinae 3. Pteropleura with a loose assemblage of Proboscis not formed as above, label- hairs near center above the caudal lum functional and expanded, arista sternopleural bristle, palpi conspic- of nearly similar character above uously dilated, frons in both sexes and below ...... , . . . . . 7 about one third maximum width of head 7. Lower scale of calyptrae enlarged mesad and without cruciate bristles . Lispinae so as to impinge at base of scutellum, Pteropleura without hairs, or if pre- caudal margin transverse (exception sent the palpi not conspicuously di- P&cia pabulorum Fall&) . . Muscinae lated and/or frons in male not one Lower scale of calyptrae not enlarged third width of head ...... 4 so as to impinge at base of scutellum, 4. One pair of presutural dorsocentral caudal margin usually semicircular . 8 bristles present, frons in both 8. Hind tibia withoug posterodorsal bristles, sexes sinrilarly broad and similarly or if present usually restricted to bristled, and with one pair of re- proximal half of tibia (exception current paraorbital bristles, lower HeZina spurk Malloch) ...... 9 stigmata1 bristle usually curved Hind tibia with one or more postero- downward (fig. 15), if two pairs of dorsal bristles, usually not restrict- presutural dorsocentral bristles pre- ed to proximal half of tibia (ex- sent the anterior pair shorter than ception Fall&) . half the length of posterior pair . Phaoniinae Coenosiinae p. p. 9. Prealar bristle and cruciate bristles 4 Huckett: The Muscidae of California 5

absent, abdominal marks when present of a point on costa opposite r-m cross- usually subtriangular, trapezoidal, vein...... 8 subquadrate or arcuate, not as only Fore femur with only one or two distal paired spotlike marks or a median postroventral bristles, mesonotum with stripe , ...... Linmophorinae weak presutural dorsocentral bristles, Species without the above combination shorter than the posterior notopleural of characters ...... Mydaeinae bristle, eyes oblong in outline, the width well maintained ventrad, costal Subfamily COENOSIINAE cell enlarged, humeral cross-vein long- er than r-rn cross-vein and subcosta KEY TO GENERA AND SUBGENERA IN CALIFORNIA uniting with costa at a point opposite 1. Aristal hairs pectinate, longer than r-m cross-vein . . . . Rondani width of third antennal segment, pro- 8. Arista thickened throughout the proxi- frons with hairs . . . . Pentacricia Stein mal third, dorsum of second antennal Aristal hairs shorter than width of segment markedly depressed or flatten- third antennal segment, profrons ed proximad , ...... Tetramerim Berg without hairs , ...... 2 Aristal swelling confined to base, 2. Mesonotum with one pair of presutural second antennal segment not depress- dorsocentral bristles, if a second ed on dorsum, normal ...... 9 pair is indicated such bristles are 9. Frons with 2 pairs of recurrent paraorbi- scarcely longer than one-third the tal bristles, the anterior pair set length of the stronger pair . . . . . 3 about half way between the verticals Mesonotum with two pairs of presutural and the anterior parafrontal bristles, dorsocentral bristles, the shorter with usually 2 pairs of incurving being more than half the length of parafrontals (fig. 3.) ...... the longer pair ...... 7 Lispocephaki Robineau-Desvoidy 3. Frontal vitta at a level with the anteri- Frons with or without recurrent para- or ocellus as wide or wider than its orbital bristles, when present the length from anterior ocellus to anteri- anterior or only pair present set near or margin, mid tibia with an antero- a level with the anterior ocellus or ventral bristle , . . Schoenomyza Haliday much nearer to the verticals than to Frontal vitta longer than wide, or if the anterior pair of parafrontals, as wide as long mid tibia without an with 3 or 4 pairs of incurving para- anteroventral bristle ...... 4 frontal bristles (fig. 6.) . . . . . 10 4. Hind femur with a preapical bristle on 10. Hind tibia with usually one anteroventral posterior plane or surface, fig. 19 . bristle, seldom none, and with one Malloch anterodorsal . . . Rondani Hind femur without a preapical posterior Hind tibia with usually 2 or more bristle (fig. 20) ...... 5 anteroventral and/or 2 or more antero- 5. Hind tibia with two adjacent bristles dorsal bristles ...... , . 11 at middle, situated respectively on 11. Frontal vitta at a level with anterior anterior and anterodorsal surfaces, ocellus as wide in both sexes as the middle sector of anteroventral surface distance between the first pair of without a bristle, fore tibia with a dorsocentral bristles, frontal triangle strong apical mid ventral bristle . . densely silvery in the male and Coenosia Meigen witish pruinescent in the female, ex- Hind tibia without a lengthy anterior tending cephalad to the base of an- bristle adjacent mid anterodorsal, tennae ...... Limnospih Schnabl* usually with an anteroventral bristle . 6 Frontal vitta so, narrower in both 6. Lower calyptral scale usually much larger sexes than the distance between the than the upper and protruding around first pair of dorsocentral bristles, the margin of the upper scale (ex- frontal triangle not silvery nor ception L. maculiventris) ...... whitish pruinescent and does not ex- Limosia Robineau-Desvoidy tend to the base of antennae . . . . Lower calyptral scale not much larger Pseudocoenosia Stein than the upper, at most not reaching beyond the tips of hairs on margin of Genus Schoenomyza Hal iday upper Rondani scale . . . . . Hoplogaster SchoenMyza Haliday, 1833, Entomol. Mag., 1:166. Fore femur with an extensive series of 7. Type-species: Schmyaa faskata Meigen, by posteroventral bristles, mesonotum subsequent designation of Westwood 1840 (= Qchti- with one or two pairs of presutural phiZa Zitore 2 Za Fallkn 1823) dorsocentral bristles as long as the posterior notopleural, eyes hemis- The genus Schoenomyza includes a few diminu- pherical in outline, narrower ventrad tive dark gray or brown species of acalyptrate than at middle, costal cell normal, subcosta uniting with costa proximad semblance. The flies occur chiefly on grasses 6 Bulletin of the California Insect Swlvey and herbage common to swamps, around ponds and lakes, and along the seashore. The frons of the adult is usually as broad as long, wider in dorsa- lis and titorella, with l or 2 pairs of parafron- tal bristles, in addition to the paraorbital pair, antennae porrect, mid tibia with an anteroventral bristle, hind metatarsus with a weak basal bristle on the ventral surface.

KEY TO MALES OF SCHOENOMYZA IN CALIFORNIA 1. Palpi dull yellow, frons brown . . . . &frons Malloch* Palpi fuscous or blackish ...... 2 2. Parafrontals with a pair of bristles op- posite base of antennae, as in female; frons without whitish pruinescence . 3 Parafrontals without bristles opposite base of antennae, frons with whitish pruinescence ...... 4 3. Frons, face and parafacials deep golden brown or ochreous, interfrontalia seen from above reddish on cephalic half . lispirla (Thomson) Frons, face and parafacials deep seal or blackish brown, frons seen from above evenly blackish . . . . nigriceps Huckett 4. Antennae largely luteous and pruines- Map 1. California distribution of Sehoenomyza dorsalis LOW. cent, frontal wedge narrow, lance- olate, (fig. l), face basically yellow Atlantic coast to Florida, in the southern states to bronzy, entirely or mostly so . . from Louisiana, and on the Pacific coast from Wash- dorsaZis var. sulfdceps Malloch ington to California Antennae mainly darkened (exclusive of California records (map 1) .--Throughout the pruinescence), face usually deeply mountainous parts of the state and along Transition tinged, golden yellow to orange . . . 5 Zone coastal areas. Absent the more austral por- 5. Frontal wedge, seen from above, usually tions of the Central Valley and both high and low broad and well etched (fig. 2) . . . deserts. dorsalis Loew Frontal wedge, seen from above, short Schoemmyza doraazis is on the wing nearly and restricted caudad, or largely ob- throughout the year near the coast, with records scured by whitish pruinescence . . . litorella (Fall&) for every month from one station or another in south- ern California. In central coastal counties and dorsal is Low Schoenomyza northward the activity season encompasses at least (Fig. 2; map 1) March to October, while in the Coast Ranges and Schoenomyza dorsaZis Loew, 1872, Berl. Entomol. the flight period is shorter, restrict- Z., 16: 95. ed to the summer months at high elevations. The 1 Type: $, District of Columbia. Geographic range.--Widely distributed in con- species has wide ecological tolerance, ranging from tinental North America, reaching its northern the edge of the Colorado Desert and through much of range in central Alaska, the Yukon and Mackenzie the to near 12,000 feet in the south- River Basin, eastward across the provinces from British Columbia and Alberta to Quebec and south- ern Sierra Nevada. ern Labrador, thence southward to include the The male of S. dorsalis has the face deeply ting- states in the northeast, in the Great Lakes region and along the northern tier, southward along the ed, usually a golden yellow to orange as in the male of S. litorella, from which it usually may be dis- 1. Absence of institution citation in parentheses following tinguished by a broad dark V-shaped frontal. wedge citation of the type signifies that the location of the type specimen is unknown separating the whitish areas on the frons, (fig. 2). 7 Huckett: l‘he Muscidae of California

The females of the two species are not readily dis- tinguished from one another. Schoenomyza dorsalis var. sul furiceps Malloch (Figs. 1, 37, 46, 52)

Schoenomyza dorsatis SuZfUriceps Malloch, 1918 , Trans. Am. Entomol. SOC., 44: 288. Holotype: 6, Berkeley Hills, California (ANSP). Geographic range. --Alberta, British Columbia, California, Idaho, Montana, Nevada, Oregon, Washing- ton , Wyoming. The variety SuZfUriceps of S. dorsaZis is evi- dently the most widely distributed representative of the genus in California. Over one thousand specimens were assigned to the taxon of which 349 were males. Specimens were recorded from approxi- mately 195 localities in 39 counties. The adult male may be distinguished from its relatives by the marrower median frontal wedge separating, or nearly so, the lateral whitish areas of frons (fig.

l), and by the largely luteous or reddish yellow 0. i. ._- silvery antennae. The females are with difficulty Map 2. California distribution of Schoenomyza Litorelk separable from those of S. Zitorella and S, dorsa- (Fall&). lis. In both sexes of S. sulfw%ceps the face is typically paler than in the latter two forms. males of S. dorsalis and S. Zitorella. In S. lis- Schoenomyza lispina (Thomson) pina the frons and face of the male are mainly ochreous to deep golden brown; in the female the OchtiphiZa lispina Thomson, 1869, In K. Svenska Vetenskaps-Akademien, Kongliga svenska interfrontalia has a blaze of whitish or pale 01- fregatten Eugenies resa omkring jorden. Pt. ive gray. 2. Zoologie. [Sec.] I: Insekter, p. 599. Schoeraomyza cmvexifmns Malloch, 1918, Trans. Am. Schoenomyza nigri ceps Huckett Entomol. SOC. 44: 287. Schoenomyza flav.tceps Stein, 1920, Arch. Natur- Schoemmyza nigr6ceps Huckett, 1966, Proc. Calif. gesch., (1918) Abt. A 84 (9): 105. Acad. Sci., ser 4, 34: 278. Type: d, California (t4” Stockholm). Holotype: d, Humboldt or Siskiyou County, Cali- Geographic range.-+.E. Alaska, British Colum- fornia (CAS). bia, California, Oregon, . GeographZcaZ and CaZifornia record. California ~~CO~~S.--UTJMBOLDTCO. : Eureka, 1 --Same locality as holotype, 2 6, May or June 0, VII-15-35 (R. H. Beamer, UK). MARIN CO.: Bo- 1911, Oldenberg Collection (CAS). linas, 1 $’, V-6-51 (E. I. Schlinger, CIS). MONO The male of S. nigrieeps differs from that of CO.: Sardine Creek, 8,500 ft. 1 0, VI-28-51 (A. S. tisph in having the frons and face entirely T. McClay, UCD). MONTEREY CO.: Pacific Grove, 1 ?, X-7-06 &J. C. Bradley, CV). Point Pinos, Paci- blackish or deep seal brown. The above two speci- -24-52 (P. Arnaud, CAS). ORANGE CO.: H. mens including the holotype are on the same mount. Sunset Beac , 1 S, Vf-12-48 (A. L. Melander, USNM). SAN MATE0 CO.: Millbrae, 2 6, 1 0, 111-20-08, type series of conve~fmns,(ANSP; I11NHS). SANTA Schoenomyza litorella (Fall&) CLARA CO.: Leland Stanford University, 1 6, Lot 72 (USNM). (Map 2) Males of S. lispina and S. nigriceps are with- Ochtiphila litoreZZa Fallgn, 1823, Monographia out whitish pruinescence on the frons, and possess Muscidum Sveciae. Phytomyzides et Ochtidiae Sveciae p. 10. a pair of parafrontal bristles opposite the base Schoenomysa dorsalis partita Malloch, 1918, Trans. of antennae, thus differing essentially from the Am. Entomol. SOC., 44: 289. 8 Bulletin of the California Insect Survey Type: 9, Southern Sweden. Emden , 19 40 :94) . Geographic range.--Holarctic; in The Nearctic: Alaska, Alberta, British Columbia, California, Subgenus Coenosia Meigen Colorado, Idaho, Manitoba, Montana, Northwest Ter- ritories, New York, Oregon, Quebec, Saskatchewan, Coenosia Meigen sensu Westwood, 1840, Introd. mod. Utah, Washington. Class. Ins., 2 Synopsis p. 143. California recor&.--ALAMEDA CO.: Berkeley Chcea Robineau-Desvoidy, 1830, [Paris] Inst. de Hills, 1 d, m-11-08, type of dorsalis partita, France, [Cl. des] Sci. Math. et Phys., Acad. (ANSP). CONTRA COSTA CO.: Point Molate, Richmond, Roy. des Sci., Mem. present& par divers Sa- 3 9, 11-11-64, 1 6, 2 2, 11-27-64 (3. Powell, CIS). vans [ser. 21, 2: 530. HlTMBOLDT CO.: 3.5 mi. S. of Scotia, 1 d, 3 2, VI- 10-65 (T. W. Fisher, UCR). MARIN CO.: Lagunitas Hind tibia with two adjacent bristles near Canyon, 1 d, I 0, 111-29-08, paratypes of dorsazis middle, situated respectively on anterior and an- purtita (111NHS). MONTEREY CO.: Asilomar, 1 6, IX-1-45, 19, X-2-46, 1 d, 3 Q, VIII-4-50 (A. L. terdorsal surfaces and without an anteroventral Melander, USNM). SAN MATE0 CO.: Millbrae, 1 9, bristle exclusive of the apical, hind metatarsus 111-20-08. SANTA BARBARA CO.: Santa Ynez River, 1 d, 1 2, VI-23-65 (M. E. Irwin, UCR) . SANTA with a weak bristle at the base of ventral surface, CLARA CO.: Palo Alto. 1 d, VIII-3-94 (R. W. Doane, fore tibia with an apical mid ventral bristle, hind CU). SHASTA CO.: 3 mi. SE. of Mt. Lassen, 2 6, VII-8-55 (J. W. MacSwain, CIS). SONOMA CO.: 4 mi. femur without a preapical posterior bristle. W. of Plantation, 1 d, V-8-58 (D. Burdick, CIS). KEY TO SPECIES OF COENOSIA (COENOSIA) IN CALIFORNIA In the male of S. Zitorella the pruinescence Mid and hind femora entirely blackish, scutellum on interfrontalia is undivided along the median without setulae on lateral declivities ad- plane, the short wedge if present being reduced to jacent to basal pair of bristles, hind tibia with 1 strong bristle at apex of a small area not extending to the cephalic half anteroventral surface . . . hun6Zis Meigen of interfrontalia. The antennae are mainly dark- Mid and hind femora broadly yellowish on distal third, scutellum with setulae ened (exclusive of pruinescence) and the face is on lateral declivities adjacent the deeply tinged as in the male of S. dorsalis. basal pair of bristles, hind tibia with 2 strong bristles at apex of antero- Genus Coenosi a Mei gen ventral to ventral surface ...... tigrina (Fabricius) Coenosia Meigen, 1826, Syst. Beschr., 5: 210. Type-species : EQusca tigrim Fabricius , by Coenosia (Coenosia) humilis Meigen subsequent designation of Westwood,1840. (Map 3) The genus Coenosia may be distinguished from other genera belonging to the Coenosiinae by pos- Coenosk humills Meigen, 1826, Syst. Beschr., 5:220. session of the following combination of characters: Anthomyaa nana Zetterstedt, 1845, Diptera Scand., One pair of presutural dorsocentral bristles, one 4: 1716. Type: 6, Germany ? (MNH Paris). pair of recurrent paraorbital bristles, mid tibia Geographic range.--Holarctic; in the Nearctic without an anteroventral bristle, lower stigmata1 this species occurs in the north temperate region of North America, and to the east from the pro- bristle curved downward (fig. 15), frontal vitta vinces of Ontario and Quebec southward to New longer than wide. Within the genua are included England, New Jersey, and the states of the Great Lakes region; in the west from Idaho, Utah, and the subgenera Coenosia Meigen 68318. str., L~mosia Colorado in the Rocky Mountains, and from Washing- Robineau-Desvoidy, Hoplogaster Rondani, NeodexG ton to California on the Pacific Coast. California records (map 3). --Restricted to opsis Malloch. coastal areas and inland valleys at low elevations. The habits of these species are little known. Lack of records from the counties pro- bably is an artifact of collecting effort, Larvae are cited as being zoophagous or scavengers, Adults of GoenosLa huntilk have been taken from and are recorded as living in damp locations rich February to November in coastal parts of both cen- tral and and only during the in humus or organic matter (Malloch, 1917: 35). summer months in the Central Valley. Adults of certain species, e. g. Coenosia tigrim, Coenosi a (Coenosia) tigrina (Fabricius) C. hwmrlis, are known to be predaceous on smaller tigrha Fabricius, 1775, Syst. Entomol., p. diptera (Evans, 1930; Hobby, 1931; 1934; Van 779. Huckett: The Muac~daeof California 9 Subgenus Limosia Robineau-Desvoidy Limosia Robineau-Desvoidy, 1830, [Paris] Inst. de France, [Cl. des] Sci. Math. et Phys., Acad. Roy. des Sci. Mkm. present& par divers Savans [ser. 21, 2: 535. Macrocoenosia Malloch, 1920, Trans. Am. Entomol. SOC., 46: 162. Type-species : Lirnosia campestds Robineau- Desvoidy, by subsequent designation of Coquillett, 1901. Having the characters possessed by the genus Coenosia, but lacking the posterior preapical bristle on hind femur, as is present in Weode&- opsis; without a strong mid-ventral apical bristle on fore tibia, as is present in Coenosk sens. str.; and having in most species a larger more con- spicuously extended lover calyptra1 scale than in Hop togas ter.

KEYS TO SPECIES OF COENOSIA (LIMOSSA) IN CALIFORNIA Males 1. All femora black, except possibly at apices and occasionally at base ... 2 Mid and hind femora entirely fulvous, or partly so on proximal half .... 6 2. Knobs of black, calyptrae browned, frons and parafacials en- California distribution of Coenosia h&Zis Meigen. Map 3. tirely brownish black . effuzgens Huckett Knobs of halteres yellow, calyptrae Coenosia sewmcutata Walker, 1849, List Dipt.Br. not browned ...... 3 Mus., 4: 970. 3. Mid femur with a preapical anterior Type: Sex not indicated England (locality bristle, fore tibia with a preapi- unknown). cal posterodorsal ...... 4 Geographic range.--Holarctic; in the Nearctic: Mid femur without anterior preapical Alberta, British Columbia, California, Connecticut, bristle, fore tibia with preapical Idaho, Massachusetts, Maine, Michigan, Montana, New posterodorsal weak or absent .... 5 York, Ontario, Quebec, Oregon, Washington. 4. Tibiae infuscated .... fraterna Malloch California recor&.--This species was recorded Tibiae yellow ...... nigrescens Stein from 109 localities in 39 counties, with a distri- 5. Mid and hind femora broadly yellowish bution broader but similar to that of Coenosia on apical region, extending on mid atiena (map 4). C. tigrina was represented in the femur to include the preapical pos- collections by 93 male and 258 female specimens. terior bristles, abdominal bristles weak ...... aliena hlloch In southern California Cosnosia tigrha has Mid and hind femora narrowly yellowish been rarely collected and apparently is restrict- at apex, not extending on mid femur to include the posterior preapical ed to the mountains. Northward it occurs along bristles, abdominal bristles strong . the coast, flying from February to September in alticola Malloch 6. Hind tibia with a profuse series of the Bay area, but has been taken on- fine longish bristles and setulae ly during the summer months along the north coast. on anterior and dorsal surfaces, fore femur bristleless on posterodorsal In the Central Valley adults are active from late and posteroventral surfaces, mid March through summer, while the activity season is femur without preapical posterior bristles, hind femur without series shortened in the mountains, May till September in of anterodorsal or anteroventral Siskiyou County, and June till August in higher bristles ...... tuma Huckett Hind tibia not profusely bristled on Parts of the Sierra Nevada. Curiously, the latest anterior and dorsal surfaces, fore records, for October, are from inland arid stations femur with posterodorsal and poster- oventral bristles, mid femur with with pronounced winter seasons, in Inyo and Modoc preapical posterior bristles, hind Cow ties. femur with a series of anterodorsal 10 Bulletin of the California Insect Smey and anteroventral bristles ...... 7 not robust ...... persp&na Euckett 7. Mid femur with a preapical anterior 17. Hind tibiae, at least, fuscous .... 18 bristle ...... 8 Hind tibiae fulvous ...... 19 Mid femur without preapical anterior 18. Frons entirely silvery pruinescent, at bristle ...... 13 middle wider than one third maximum a. Hind tibia with a lengthy slender pre- diameter of head as seen from above . apical posterodorsalbristle ..... argentcmta Coquillett conform occidentalis Huckett Frons velvety black, at middle not Hind tibia with preapical posterodor- wider than one third maximum dia- sal bristle weak or absent, not long- meter of head as seen from above ... er than apical diameter of tibia ....9 antkrecina Malloch 9. Sternum 5 with lengthy slender bristles, 19. Hind tibia with mid anterodorsal and third antennal segment about twice as preapical mid dorsal bristles each long as wide, distance from apex to about as long as three-fourths length oral margin about equal to its width . 10 of hind tibia, mid anteroventral and pre- Sternum 5 weakly and sparsely setulose, apical anterodorsal bristles each about without slender bristles, third an- as long as hind metatarsus, and with a tennal segment longer than twice its series of fine shorter anterodorsal width, distance from apex to oral mar- bristles, mid tibia with mid anterior gin less than its width at middle of bristle longer than mid metatarsus . . segment ...... atrata Walker pitosissima Stein 10. Processes of Sternum 5 usually dull Hind tibia with shorter anteroventral, along inner (ventral) border, abdo- anterodorsal, preapical mid dorsal men slender, hypopygium not pro- and preapical anterodorsal bristles, truded ...... rubdna Huckett and without a series of fine shorter Processes shining along inner (ventral) anterodorsal bristles ...... 20 border, not slender, hypopy- 20. Abdomen and without marks ... 21 gium knobby ...... 11 Abdomen usually with paired marks, sel- 11. Processes with several long bristles dom entirely obscured ...... 22 from base to apex that are directed 21 Basal scutellar bristles short, not ventrad, third antennal segment mainly as long as half length of apical grayish black ...... 12 bristles, third antennal segment en- Processes sparsely bristled, the longer tirely lemon yellow, anterior ocellar restricted to apical region, third bristles each not longer than width antennal segment usually mainly of interfrontalia .... fontam Huckett yellowish ...... bonita Huckett Basal scutellar bristles much longer 12. Fore coxae and all femora fulvous ... than half length of apical bristles, mfibasis Stein third antennal segment partly grayish Fore coxae grayish black, fore femora tinged, anterior ocellar bristles each partly blackish, mid and hind femora longer than width of interfrontalia . infuscated on distal half ...... can.&& Huckett mfibasis var. strigifemur Stein 22. Palpi yellow, and third antennal segment 13. Fore and hind tibiae and usually mid basically so, occasionally tinged, setu- tibiae without bristles near middle lae on anterior surface of humeral cal- of tibia ...... nudipss Stein losities stiffened, pronotal pair of Fore andfor mid and hind tibiae, each dorsocentral setae spinulose (fig. 10) .23 with 1 or more bristles near middle Palpi fuscous, setulae on anterior surface of tibia ...... 14 of humeral callosities not stiffened, 14. Abdomen with basal segments yellowish and pronotal pair of dorsocentral setae or whitish testaceous ...... 15 nonspinulose ...indsurata van der Wulp Abdomen with basal segments gray or 23. Hind tibia with mid anterodorsal and blackish, concolorous with thorax . . 17 preapical mid dorsal bristles to- 15. Hind tibia with preapieal mid dorsal gether as long as hind tibia, hind femur and anterodorsal bristles situated with the longer anteroventral , anter- on about the same transverse plane . . odorsal and posteroventral bristles f&soni Malloch as long as hind metatarsus ...... Hind tibia with preapical mid dorsal argenticeps Malloch situated on a transverse plane dis- Hind tibia with mid anterodorsal and pre- tinctly basad of preapical anter- apical mid dorsal bristles together odorsalbristle ...... 16 shorter than hind tibia ...... 24 16. Abdomen without dorsal marks, anterior 24. Abdomen with a pair of lengthy rather pair of ocellar bristles usually elongated marks on terga 3 and 4, robust ...... albibasis Stein lower calyptra1 scale reduced in Abdomen with paired dorsal marks, size ...... maculiventds Huckett anterior pair of ocellar bristles Huckett: The Muscidae of CaZifornia 11

Abdomen with a pair of short compact apex to oral margin about equal to marks on terga 3 and 4 (sometimes itswidth...... 12 obscured), broadly separated across 12. Fore coxae and mid and hind femora dorsum, membrane of lower calyptral fulvous ...... mfibasis Stein scales well extended beyond margins Fore coxae grayish black, mid and hind of upper ...... oregonensis Malloch femora infuscated on distal half . . mfibasis var. stri.gifemur Stein Females 13. Abdomen usually with small roundish 1. All femora black, except possibly at spots ...... rubrina Huckett apices and occasionally at base ... 2 Abdomen usually with spots of uneven Mid and hind femora at least largely density ...... bonita Huckett or partly yellowish on proximal 14. Hind tibia with preapical mid dorsal half...... 7 and preapical anterodorsal bristles 2. Knobs of halteres blackish ...... on about the same transverse plane . . effulgens Huckett frisoni Malloch Knobs of halteres yellow ...... 3 Hind tibia with preapical mid dorsal 3. Mid femur with a preapical bristle on bristle set on transverse plane dis- anterior surface ...... 4 tinctly basad of preapical anterodor- Mid femur without preapical bristle sal...... 15 on anterior surface ...... 5 15. Anterior surface of humeral callosi- 4. Tibiae extensively infuscated, or ties with stiffened setulae, pronotal fuscous ...... fratema Malloch pair of dorsocentral setae spinulose Tibiae yellow ...... nigresoens Stein (fig. 10) ...... 16 5. Frontal vitta seen from behind vel- Anterior surface of humeral callosi- vety black, parafrontals brown, ties with setulae not stiffened, pro- fore and mid tibiae fuscous or notal pair of dorsocentral setae non- blackish ...... anthracina Malloch spinulose (fig. 9) ...... Frontal vitta seen from behind not incisurata van der Wulp velvety black, parafrontals gray- 16. All tibiae yellowish brown, darker than ish, fore and mid tibiae yellowish . 6 yellowish parts of mid and hind femora . 6. Mid femur with yellowish apical region argentata Coquillett extending to incrude preapical pos- Tibiae yellow, not darker than yellow- terior bristles .....aliena Malloch ish parts of femora ...... 17 Mid femur with yellowish apical region 17. Third antennal segment and palpi entire- not extending to preapical posterior ly yellow, basal pair of scutellar bristles ...... azticola Malloch bristles about half as long as apical 7. Hind tibia with 2 anteroventral and bristles, abdomen whitish gray, un- abnormally longer semierect setulae marked ...... fontana Huckett and short bristles on anterior and Third antennal segment and/or palpi part- dorsal surfaces ..... tausa Huckett ly or entirely blackish, basal pair of Hind tibia with 1 anteroventral and scutellar bristles longer than half normally short appressed setulae on length of apical bristles, abdomen distal and proximal halves of anteri- usually with marks ...... 18 or and dorsal surfaces of tibia ... 8 18. Tergum 5 with paired marks weak, faded 8. Mid femur with a preapical bristle on or absent ...... 19 anterior surface ...... 9 Tergum 5 with well marked paired spots . 22 Mid femur without preapical bristle on 19. Fore femur mostly infuscated on dorsal anterior surface ...... 14 and ventral halves ...pilosissirna Stein 9. Hind tibia usually with a slender pre- Fore femur usually mostly yellow, in- apical posterodorsal bristle, discal fuscation at most confined to dorsal bristles on terga 4 and 5 weak ... half...... 20 conforma occidentalis Huckett 20. Third antennal segment yellowish at bas- Hind tibia with preapical posterodor- alregion...... 21 sal bristle absent or setulose, dis- Third antennal segment blackish at bas- tal bristles on terga 4 and 5 robust 10 al region ...... candida Huckett 10. Third antennal segment entirely gray- 21. Mesonotum and scutellum browned on dor- ishblack...... 11 sum, abdomen with large patchlike Third antennal segment yellowish at marks on terga 3 and/or 4 . nudipes Stein base...... 13 Mesonotum and scutellum mostly grayish 11. Third antennal segment longer than twice or lightly infuscated on dorsum, ab- its width, distance from apex to oral domen with or without restricted spot- margin less than its width at middle like marks on terga 3 andlor 4 .... of segment ...... atrata Walker albibasis Stein Third antennal segment about twice as 22. Lower calyptral scale large, broadly ex- long as mid width, distance from tended ...... 23

. 12 BulZetin of the California Insect Survey Lower calyptra1 scale reduced or restrict- ed, narrowly extended ...... 24 23. Mld and hind femora infuscated on distal half ...... oregonensis Malloch Mid and hind femora mostly fulvous on distal half, occasionally with a ru- fous scar or streak along dorsum ... qenficeps Nalloch 24. Anterior pair of ocellar bristles longer than caudal pair . . macuziventds Huckett Anterior pair of ocellar bristles weak, not longer than caudal pair ...... perspicut Huckett

Coenosia (Limosia) albibasis Stein (Figs. 10, 26) Coenosia albibasis Stein. 1920. Arch. Naturgesch., (1918) Abt. A 84 (9): 95. Syntypes : 6-d, Roche Harbor, Anacortes , Mt . Constitution and Friday Harbor, Washington (USNM). Geographic range.--British Columbia, Califor- nia, Oregon, Washington. Culifornia records. --FRESNO CO. : Huntington , 6 9, VII-27-19 (E. P. Van Duzee, CAS). HUMBOLDT CO.: 1 d, IV-1911 (Nunenmacher, Ha)? INYO CO.: Bishop, 1 d, VII-28-40 (L. J. Lipovsky, - ~- ...... _II, UK). Lone Pine, 1 0, VII-28-40 (L.J. Lipovsky, Map Coaosia atia UK). MONO CO.: Mammoth Lakes, 1 d, 10, VII-29- 4. California distribution of Malloch. 40 (R. H. Beamer, UK). SAN FRANCISCO CO.: San Francisco, 1 0, V-13-15, 1 2, VIII-7-19 (E. P. Van Duzee, CAS). SAN MATE0 CO.: San Gregorio, son, during the warmer months, from April to Sep- 1 0, VIII-22-53 (P. H. Arnaud, HCH). TUOLUMNE tember near the coast and June to September in the GO.: Dardanelles, 1 0, VII-13-51 (W. H. Lange, UCD) . Sierra Nevada. However, it has been taken only in Males of C. albibasis and C. perspimra, unlike October in Modoc County (two records) and in Sep- the females, have the basal segments of the abdo- tember in the San Bernardino Mountains (three re- men largely testaceous. The male of C. ulbibasis cords). has no distinct abdominal marks, and in both sex- The species C. aliena and C. alticoza have all es the anterior pair of ocellar bristles is usual- femora largely black and tibiae fulvous, and in ly lengthy, thus differing from C. perspicua. this respect differ from similar species by having no preapical bristle on anterior surface of mid fe- Coenosia (Limosia) aliena Malloch mur. The species C. aliena differs from C. alti- (Map 4) cola in having a more extensive yellowish apical aliena Malloch, 1921, Entomol. News, 32: Coenosia region on mid femur, so as to include the pre- 134. apical pair of bristles. Holotype: 0, Gallatin County, Montana (111?s). Geographic range. --Alaska, Alberta, British Coenosia (LimosiaJ alticola Malloch Columbia, California, Colorado, Idaho, Montana, Northwest Territories, Oregon, Utah, Washington, ? (Map 5) Wyoming, Yukon Territory. Coenosia alticoza Malloch, 1919, Proc. Calif. Acad. California records (map 4).--Restricted to the Sci., ser. 4 9: 303. Cascade, Sierra Nevada and San Bernadino Mountains and the coastal area around the San Francisco Bay Holotype: d, Huntington Lake, California (CAS). according to available records, which represented Geographic range.--California, Oregon, Utah. about 50 localities in 19 counties. CaZifornia records.--ALPINE CO.: , Coenosia aliena has a rather short flight sea- 1 d, IX-11-38 (M. A. Casier, AM?). EL DORADO CO.: Huckett: The Muscidae of CaZifomzia 13 Coenosia (Limosia) anthracina Malloch

Coenosia mthracina Malloch , 1921, Entomol. News , 32 : 134. Holotype: 0, Gallatin County, Montana (111NHS). Geographic range.--Alaska, Alberta, Arizona, British Columbia, California, Colorado, Idaho, Lab- rador, Montana, Nevada, Northwest Territories, Quebec, Utah, Washington, Wyoming, Yukon Territories. California P~coP&.--NEVADA CO.: Sagehen Creek near Hobart Mills, 1 $2, VII-7-64, 1 d, 1 2, VII-9-64, 5 0, VII-15-64, 1 d, 1 0, VII-16-64, in malaise trap (M. E. Irwin, UCR). TUOLUMNE CO.: Sonora Pass, 4 ?, VIII-21-59 (D. D. Linsdale, J. Powell, CIS), 2 ?, VIII-13-60 (W. A. Steffan, CIS). The species C. an-thracina resembles Hoplogas- ter flmibasis Huckett* in the coloration of the legs, but differs from the latter in having a lar- ger lower calyptra1 scale, and in its darker shiny appearance. In the male of C. anthracina the marks on the abdomen are lacking or obscured. In both sexes the frontal vitta is deep velvety black, the tibiae largely infuscated. All femora * ____ are entirely blackish in the female, but yellow Map 5. California distribution of Coenosia azticoh Malloch. on the proximal region of mid and hind pairs in the male. Fallen Leaf, 6,500 ft. 1 $, VII-13-61 (J. G. Chill- cott, CNC). Grass Lake, Luther Pass, 3 d, VII-24- Coenosia (Limosia) arqentata Coquillett 55 (E. I. Schlinger, UCD). FRESNO CO.: Huntington Lake, 7,000 ft. 1 d, VII-9-19, holotype, 1 ?, VII- Coenosia argentata Coquillett, 1904, Invert. Paci- 29-19 (E. P. Van Duzee, CAS). INYO CO.: Bishop, 1 fica, 1:33. 6, 1 $, VII-25-40 (R. H. Beamer, UK). MONO CO.: Con- Coenosia argentieozor Stein, 1920, Arch. Natur- vict Creek, 1 ?, VI-6-48 (W. W. Wirth, USNM). McKay gesch., (1918) Abt. A 84: 96. Creek, Sonora Pass, 1 d, VIII-18-60 (C. A. 'Toschi, CIS). Sardine Creek, 8,500 ft. 1 6, VI-28-51, 2 d, Holotype: d, Stanford University, California 8 p, VII-3-18-51 (A. T. McClay, UCD). NEVADA CO.: (USNM). Boca, 1 p, VI-23-61 (F. D. Parker, UCD). Sagehen Creek, near Hobart Mills, 2 9, VII-15-64, in malaise Geographic range.--California, Oregon, Wash- trap, 1 p, same date, by sweeping (M. E. Irwin, UCR). ington. Sagehen, near Hobart Mills, 1 9, VII-16-54 (G. A. California records. --ALAMEDA CO. : Berkeley , 1 Schaefers, CIS). SHASTA CO.: Echo Lake, Shasta 0, X-25-17 (J. C. Bradley, CAS); 1 9, IX-19-36 (C. Range, 1 1 $!,VIII-29-11 (A. d, Kusche, HCH). Sum- A. Hamsher, UCD). CONTRA COSTA CO.: Moraga Val- mit Lake, Lassen National Park, 1 ?, VII-23-50 (L. ley, 2 ?, IV-4-20 (E. P. Van Duzee, CAS). 2 mi. W, W. Quate, CDA). TUOLUMNE CO.: Leland Meadow, 2 d, of Pittsburg, 1 9, 1.12-19-57 (J. A. Powell, CIS). 1 0, VIII-5-60 (A. S. Menke, UCD; E. Jessen, CIS); 1 HUMBOLDT CO.: Trinidad, 1 6, IX-18-34 (A. L. p, VIII-21-60 (C. A. Toschi, CIS). Pinecrest, 10, Melander, USNM). INYO CO.: Bishop, 1 d, 1 0, V- VIII-3-48 (P. H. Arnaud, CAS). Sonora Pass, 9,624 20-51 (E. I. Schlinger, UCD). MOHTEREY CO.: Man- ft. 1 9, VIII-20-60 (A. S. Menke, UCD) . Strawberry terey, 2 d, VII-31-96, type of argenticozor, 1 ?, VII-4-51, 1 d, 1 0, VII-15-51 (A. T. McClay, (ZMUB). SACRAMENTO CO.: Sacramento, 1 d, IV-16- UCD) , 1 0, VII-8-57 (W. T. Crites, UCD) . Yosemite 56 (S. M. Fidel, UCD). SAN FRANCISCO CO.: San 3,850-4,000 ft. 2 2, VI-17-31 (CIS). Francisco, 1 9, IV-11-14, 3 6, V-12-15, 2 d, VIXI- The species C. alt