New Species of Long-Legged Flies (Diptera: Dolichopodidae) from Central Pennsylvania

PROC. ENTOMOL. SOC. WASH. 110(2), 2008, pp. 363–373

NEW SPECIES OF LONG-LEGGED FLIES (DIPTERA: DOLICHOPODIDAE) FROM CENTRAL PENNSYLVANIA

JUSTIN B. RUNYON

Department of Entomology, 501 ASI Building, Pennsylvania State University, University Park, PA 16802, U.S.A. (e-mail: [email protected])

Abstract.—Four new species of Dolichopodidae are described from central Pennsylvania: Campsicnemus wilderae Runyon, Dolichopus dracula Runyon, Dolichopus hurleyi Runyon, and Dolichopus frosti Runyon. Keys to males of Campsicnemus Haliday and Dolichopus Latreille with lamellate aristae are provided for species from eastern North America. Key Words: Campsicnemus, Dolichopus, key, Nearctic

Dolichopodidae (long-legged flies) is University; the other two, Dolichopus one of the most diverse families of hurleyi and Dolichopus frosti, were col- Diptera with over 6,800 described species lected by the author. Using label data worldwide (Yang et al. 2007). The from the two males of D. dracula present Nearctic fauna is relatively well known in the FEM (collected in 1963), I (compared to the Neotropical, for exam- collected additional specimens of this ple) with almost 1,300 described species species in 2006 and 2007. (Pollet et al. 2004), but many North American species remain undescribed, MATERIALS AND METHODS even from historically well-collected re- Morphological terminology follows gions. Over the past several decades McAlpine (1981), except genitalic termi- there has been a marked reduction in nology which follows Cumming et al. the number of Nearctic Dolichopodidae (1995) and Brooks (2005). For examina- described (for recent additions see Run- tion and illustration, genitalia were cleared yon and Hurley 2003, 2004; Brooks and using KOH, temporarily mounted in Wheeler 2005; Pollet 2005). However, glycerin, and later transferred to polymere this trend is a reflection of the small microtubes and attached to the corre- number of active Nearctic dolichopodid sponding specimen. Figures of male geni- workers rather than completion of the talia are shown as they appear on the intact Nearctic faunal inventory, since there are specimen (rotated 180u), but in descrip- large numbers of species awaiting de- tions ‘‘dorsal’’ and ‘‘ventral’’ refer to the scription (Pollet et al. 2004). In this true morphological positions, with ventral paper, I describe four new species of surface up and dorsal surface down. long-legged flies from central Pennsylva- Density of pollen is characterized as nia. Two of the new species, Campsicne- follows: very sparse, if surface not mus wilderae and Dolichopus dracula, uniformly covered and apparently lack- were found in the Frost Entomological ing pollen except when viewed obliquely; Museum (FEM) at Pennsylvania State sparse, if pollen evidently present, but 364 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON

black hairs. Scape and pedicel brown, with ventral 1/3 brownish yellow. First flagellomere brown, about as long as wide, broadly triangular, with rounded apex. Arista with short pubescence, about twice as long as scape, pedicel, and first flagellomere combined; inserted dorsally near base of first flagellomere. Uppermost postocular setae black, ventral setae brown and appearing paler in certain lights. Scutum covered with dense, dark Fig. 1. Campsicnemus wilderae, leg II of male. brown pollen; with violet reflections A, Posterior view of femur, tibia, and basitarsus. B, Dorsal view of tibia. when viewed from above; with 5 pairs of dorsocentral setae, anterior pair 1/2 not noticeably modifying integument length of remaining dorsocentrals; with color; moderately dense, if pollen lending single row of 5–6 small (5 1/4 length of its own color generally to the surface, largest dorsocentral setae), delicate ac- but not completely obscuring integument rostichal setae, this row ends posteriorly beneath; dense, if integument completely at transverse suture. Scutellum with 1 hidden by pollen. strong medial seta and 1 small lateral Legs are designated by roman numer- hair (5 1/5 length of medial) / side; als, tarsomeres by bracketed arabic nu- posterior margin with 3 slender hairs merals (e.g., Tarsus III(4) 5 4th tar- medially. Pleura, including metepimeron, somere of metathoracic leg). covered with dense, dark brown pollen and dusted with slight gray pollen. The following acronyms for museums Legs dark brown to black, except apex are used: CNC 5 Canadian National of coxa I narrowly yellow. Leg I and III Collection, Ottawa; FEM 5 Frost Ento- unmodified. Coxa I with delicate, rather mological Museum, Pennsylvania State sparse, pale hairs anteriorly; with black University, University Park; MTEC 5 seta on anterodorsal margin at 2/3; with Montana Entomology Collection, Mon- black setae at apex. Tibia I with small tana State University, Bozeman; USNM dorsal seta just before 1/2 and small 5 National Museum of Natural History, posteroventral seta just beyond 1/2. Smithsonian Institution, Washington, Femur II (Fig. 1A) not swollen; with D.C. row of short (, width of femur II) Campsicnemus wilderae Runyon, ventral setae full length, this row becom- new species ing posteroventral apically; with a few very short, blunt setae anteroventrally on (Fig. 1) apical 1/4; with hairs on anterior surface Male.—Body length 2 mm; wing longer than those on posterior surface. length 2 mm. Face short, not reaching Tibia II (Figs. 1A,B) black; gradually lower margin of eyes, very narrow near thickened to just beyond 1/2, thickened 1/2 where eyes almost contiguous; cov- portion ending in a short, wartlike ered with dense, golden brown pollen. protuberance anteriorly which bears 5– Front black with violet reflections and 6 short, blunt setae at apex; basal 1/3 very sparse brown pollen. Palpus and bearing a series of short, blunt setae on proboscis black, with moderately dense, ventral surface; with large anterodorsal light brown pollen; former with a few seta just beyond 1/3, 1/2, and at 3/4; with VOLUME 110, NUMBER 2 365 subapical seta dorsally and anteroventral- wartlike structure, but in C. montanus ly; with large, rather stout, apical poster- tibia II is yellow and the wartlike struc- oventral seta. Tarsus II(1) (Fig. 1A) ture is on the posterodorsal surface (on somewhat curved, bearing a short, stout anterior surface in C. wilderae). anterodorsal spine near apex and a spur- like projection at tip. Tibia III with 3 KEY TO MALES OF CAMPSICNEMUS HALI- anterodorsal, 3 posterodorsal, and 2–3 DAY FROM EASTERN NORTH AMERICA anteroventral setae. Ratio of tibia:tar- 1. Tarsus I(2) short, with long (almost 5 someres for leg I: 18-10-5-4-3-3; for leg II: entire tarsus), posterodorsal appenda- 27-8-6-5-3-4; for leg III: 33-8-10-6-4-4. ge...... americanus Van Duzee – Tarsus I(2) without appendage ...... 2 Wings rather narrow; hyaline, evenly 2. Wing without distinct spots...... 3 tinged with light brown; without spots; – Wing with darkened spot on last section of R4+5 and M1 nearly parallel to slightly vein M1 (faint in wheeleri) ...... 4 divergent beyond crossvein dm-cu. Ca- 3. First flagellomere long (length . 23 lypter brown, with black apex and black width); tibia II yellow ...... hirtipes Loew setae. Halter dark brown. – First flagellomere short (length 5 width); tibia II black ...... wilderae, n. sp. Abdomen concolorous with scutum, 4. Coxa I with yellow hairs and setae; tarsus but lacking violet reflections; somewhat II(1) unmodified ...... degener Wheeler flattened dorsoventrally, with black hairs – Coxa I with black hairs; tarsus II(1) greatly and setae. Hypopygium small, embed- modified ...... wheeleri Van Duzee ded; cerci partially hidden, dark brown with dense, pale hairs. Dolichopus dracula Runyon, new species Female.—Unknown. (Fig. 2) Holotype.—-, PENNSYLVANIA: Male.—Body length 6.0–6.9 mm; wing Centre Co., State College, Jan. 18 1973 length 4.8–5.6 mm. Face narrow, slightly (D. D. Wilder) (USNM). widened above; densely covered with pale Etymology.—The species epithet hon- golden brown pollen. Front metallic ors Dr. Dee Wilder, who collected the green with violet reflections, with sparse only known specimen. brown pollen, except above antenna and Remarks.—As has been reported for along orbits where pollen is dense. Palpus some other members of the genus (Harm- yellow with black hairs. Proboscis black. ston and Knowlton 1942), Campsicnemus Gena (Fig. 2A) as a black, pointed, fang- wilderae is active in the winter. It was like structure usually with dark yellow probably collected on a warm winter day brown margins. Scape yellow with dorsal on the campus of Pennsylvania State 1/3 to 1/2 black. Pedicel small, varying in University (D. D. Wilder, personal com- color from almost wholly yellow to munication). Campsicnemus wilderae keys wholly black. First flagellomere (Fig. 2A) to C. curvispina Van Duzee in Harmston short (length , width); black, with and Knowlton (1942) and C. hirtipes ventral 1/4 often yellow at base; broadly Loew in Robinson (1964), but both triangular with rounded apex. Arista long species lack the wartlike projection on (. 33 length of scape, pedicel, and first tibia II. A revised key (modified from flagellomere combined), bare, inserted Robinson 1964) that separates males of dorsally near 1/2 of first flagellomere; Campsicnemus known from eastern with small, black, rather rounded, bare North America, is provided below. Camp- apical lamella (Fig. 2C). Dorsal 1/2 of sicnemus wilderae appears to be most postocular setae black, ventral 1/2 yellow. closely related to the western C. montanus Scutum with abundant coppery reflec- Harmston and Knowlton, in which tibia tions almost concealing dark green II has a very similar shape, setation, and ground color; with sparse to moderately 366 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON

Fig. 2. Dolichopus dracula, male. A, Left anterolateral view of head. B, Posterior view of tarsus I. C, Apical lamella of arista. D, Wing. dense, brown pollen. Biseriate acrosti- hairs and setae longer and coarser chal setae extending to posterior slope of anterodorsally; sometimes with a few scutum. Pleura and metepimeron cov- small, yellow hairs among black hairs ered with dense silver gray pollen. anterodorsally near base. Coxa II and III Coxa I yellow, darkened dorsally at concolorous with pleura. Femora yellow; extreme base; anterior surface with black II and III with preapical anterodorsal VOLUME 110, NUMBER 2 367 seta. Basal 3/4 of femur I with long at apex of CuA1, immediately preceded (subequal to width of femur), black hairs basally by a prominent lobe; with a deep, anterodorsally and posterodorsally. Fe- broad sinus between A1 and CuA1; with mur III without ventral setae. Tibia I and a small sinus at apex of A1. Calypter and II wholly yellow; tibia III usually dark- halter yellow, former with black setae. ened dorsally to posterodorsally at apex. Abdomen metallic green with dark Tibia I with 6 anterodorsal, the basal- coppery reflections most evident along most anterodorsal smaller than apical 5 posterior margins of terga; with moder- anterodorsal setae, subequal in length; ately dense, silver pollen laterally. Hy- with 2 posterodorsal, and 3–4 poster- popygium of normal size, black. Cerci oventral setae. Tibia II with 5–6 ante- similar to D. phyllocerus (see Vockeroth rodorsal, 2 posterodorsal, 1–2 ventral, 1962); elongate-oval; whitish, with nar- and 3–4 anteroventral setae. Tibia III row black border except dorsally at base; with 5–6 anterodorsal, 6–8 posterodor- with apex jagged from long, digitiform sal, and 2 anteroventral setae; posterior projections bearing large, sickle- to surface with a minutely pilose, slightly scythe-shaped, black setae; with yellow darkened, slightly swollen area just hairs and setae dorsally and black setae before 1/2. Tarsus I (Fig. 2B) modified; ventrally. approximately 1 1/5 length of tibia I. Female.—Body length 5.5–6.2 mm; Tarsus I(1) longer than tarsus I(2–5); wing length 5.0–5.5 mm. Similar to male yellow with apex narrowly black; with except: face wide, uniformly covered apical 1/3 somewhat compressed but not with dense, silver gray pollen, often with widened. Tarsus I(2) black dorsally and very sparse light yellow pollen; arista at apex, brownish yellow below at base; with very short pubescence, about 23 compressed but not noticeably enlarged. length of scape, pedicel, and first flagel- Tarsus I(3–5) velvety black; tarsus I(4–5) lomere combined; without lamella; gena silvery on dorsal margin; width of tarsus absent; femur I, tarsus I, and tibia III I(3–4) greater than length, compressed, unmodified. Costa not enlarged at apex with dorsal lobe extending somewhat of R1; wing with posterior margin evenly apically such that apices of I(3) and I(4) rounded except for evident, but small roughly ‘‘V’’-shaped; tarsus I(5) a little notch at apex of CuA1. longer than wide, flattened dorsally at Holotype.—-, PENNSYLVANIA: apex, compressed only at base. Tarsus II Centre Co., Black Moshannon State black from tip of II(1); II(1) with short Park, Moss-Hanne Trail, Shirks Run, ($ width of tarsomere) dorsal seta. 1,900’ elevation, May 29 2006 (J. B. Tarsus III(1) usually dark yellow at base, Runyon); N 40u53.3809,W78u02.6299, grading to black on apical 1/4 to 1/2; muddy trail through sphagnum bog darker along dorsal surface; (one speci- (USNM). men almost wholly black); remaining Paratypes.—PENNSYLVANIA: 4 -, tarsomeres black. Ratio of tibia:tarsome- 1 U,samedataasholotype;11-,4U, res (when tarsomere greatly broadened, same data as holotype, May 28 2007; 1 -, width given in parentheses following same data as holotype, June 9 2007; 2 -, length) for leg I: 40-26-10-5(6)-3(7)-5; 2 U, Centre Co., Black Moshannon State for leg II: 64-42-20-14-8-7; for leg III: 66- Park, Black Moshannon Creek at Shirks 40-37-18-10-8. Run Road, 1,900’ elevation, May 28 Wing (Fig. 2D) hyaline, yellowish on 2007 (J. B. Runyon), N 40u52.7349,W anterior 1/3 and along veins. Costa 78u04.6119;2-, Centre Co., Black slightly enlarged at apex of R1. Posterior Moshannon, June 6 1973 (S. W. Frost) margin of wing with a rather deep notch (CNC, MTEC, USNM, FEM). 368 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON

Etymology.—The name of this species, not have a lamellate arista. In Robinson a noun in apposition, refers to the (1964) the male would key to either D. fanglike appearance of the male gena lobatus Loew, which lacks a lamellate (Fig. 2A). arista, or D. phyllocerus which can be Remarks.—Dolichopus dracula be- separated from D. dracula using the key longs to the distinctive group containing provided below. D. carolinensis Van Duzee, D. dorycerus Females of D. dracula would key in Loew, and D. phyllocerus Vockeroth Van Duzee and Curran (1934b) to either whose males are unique in having a D. coquilletti Aldrich or D. jugalis lamellate arista; black hairs full-length Tucker (5 procerus Van Duzee), both dorsally on coxa I; a slightly raised, western species that have all hairs at base minutely pilose area near 1/2 on poste- on anterodorsal surface of coxa I yellow rior surface of tibia III; and the posterior (D. dracula has black hairs full-length margin of wing emarginate and lobed. anterodorsally on coxa I). The fanglike appearance of the gena is unique to D. dracula. Females of this Dolichopus hurleyi Runyon, new species group are distinguished from most other (Fig. 3) Dolichopus by the almost wholly pale Male.—Body length 6.5 mm; wing coxa I with black hairs full-length ante- length 5.5 mm. Face rather wide, slightly rodorsally (most Dolichopus have only widened above; densely covered with pale hairs anterodorsally at base). A key silver gray pollen and very sparse light is provided here to males and females of this group, which to my knowledge, yellow pollen. Front metallic green with contains all the eastern North American violet reflections, with sparse light brown Dolichopus with lamellate arista. pollen, except above antenna and along Interestingly, I have collected three orbits where pollen is dense. Palpus members of this group at the same place yellow with black hairs. Proboscis black. (see holotype data for D. dracula) within Gena absent. Scape yellow. Pedicel a small area (, 25 m). In 2006, Dolicho- yellow with black apex. First flagello- pus dracula and D. phyllocerus were mere short (length 5 width), wholly collected on May 29 (but absent on June black, subrectangular in lateral view. 20 and July 23); D. dracula from mostly Arista 23 length of scape, pedicel, and open, sunny areas of a muddy trail first flagellomere combined; inserted through a sphagnum bog, and D. phyllo- dorsally near 1/2 of first flagellomere; cerus on this trail, but primarily in sun at essentially bare except for small, black, the shaded edge of a wooded swamp. lanceolate apical lamella which is cov- Dolichopus dorycerus was collected on ered in small hairs (Fig. 3B). Postocular June 20 (absent on May 29 and July 23) setae wholly black. from a mostly shaded boardwalk in the Scutum dark green with coppery wooded swamp, but absent from open reflections and sparse to moderately areas. In 2007, D. dracula was collected dense silver gray pollen anteriorly and with D. phyllocerus from small muddy on notopleuron. Biseriate acrostichal depressions with some standing water in setae extending to posterior slope of the bog (a boardwalk had been built over scutum. Pleura and metepimeron cov- the trail where these species were collect- ered with dense silver gray pollen. ed in 2006). Coxa I yellow, darkened dorsally at Males of D. dracula would key in Van base; anterior surface with black hairs Duzee and Curran (1934a) to D. coquil- and setae longer and coarser anterodor- letti Aldrich, a western species that does sally; with a few small, yellow hairs VOLUME 110, NUMBER 2 369

Fig. 3. Dolichopus hurleyi, male. A, Anterior view of tarsus I. B, Apical lamella of arista. C, Wing. among black hairs anterodorsally near subequal in length to tarsus I(2–5); base. Coxa II and III concolorous with yellow with apical 1/5 black. Tarsus I(2) pleura. Femora yellow; II and III with black, slightly enlarged at apex. Tarsus preapical anterodorsal seta (femur III I(3–5) velvety black; tarsus I(3–4) shining has 2 preapicals on one side). Posterior black on bare, broadened dorsal margin; surface of femur I with longer (5 1/2 width of tarsus I(3–4) greater than width of femur) hairs than anterior length, compressed, with dorsal lobe surface. Femur III with only short extending somewhat apically; tarsus ventral setae. Tibia I and II wholly I(5) a little longer than wide, flattened yellow; tibia III slightly darkened dor- dorsally, with small dorsal lobe at apex. sally to posterodorsally at apex. Tibia I Tarsus II black from tip of II(1); II(1) with 4 anterodorsal, the basalmost with dorsal seta at 3/4. Tarsus III(1) smaller than apical 3 anterodorsal setae; yellow with black apex; remaining tar- with 1 posterodorsal, and 2 posteroven- someres black. Ratio of tibia:tarsomeres tral setae. Tibia II with 5 anterodorsal, 2 (when tarsomere greatly broadened, posterodorsal, 1 ventral, and 2–3 ante- width given in parentheses following roventral setae. Tibia III with 6 ante- length) for leg I: 40-24-7-5(9)-3(7)-4; for rodorsal, 5 posterodorsal, 1 anteroven- leg II: 60-36-17-12-8-6; for leg III: 66-32- tral setae, with row of short (5 width of 28-16-10-6. tibia) ventral setae on basal 2/3; posterior Wing (Fig. 3C) hyaline, slightly yel- surface with indistinct area of smaller, lowish on anterior 1/3 and along veins. denser setae just before 1/2, not swollen. Costa not enlarged at apex of R1. Tarsus I (Fig. 3A) modified; approxi- Posterior margin of wing with small mately 1 1/5 length of tibia I. Tarsus I(1) notch at apex of CuA1; with a large, 370 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON broad lobe near apex of A1, which is at apex of R1; and having smaller preceded apically by a small sinus. genitalia (cerci reach coxa III in dory- Calypter and halter yellow, former with cerus). black setae. Abdomen metallic green with dark KEY TO DOLICHOPUS LATREILLE WITH coppery reflections; with moderately LAMELLATE ARISTA FROM EASTERN dense, silver pollen laterally. Hypopy- NORTH AMERICA gium rather small, black. Cerci project- 1. Postocular setae wholly black (males only) 2 ing anteriorly beneath abdomen only to – Postocular setae yellow on ventral 1/2 of tergum 3; shape similar to D. dorycerus head ...... 3 (see Vockeroth 1962); oval, whitish, with 2. Tarsus I(5) with white dorsal lobe...... dorycerus Loew narrow black border except dorsally at – Tarsus I(5) wholly black . . . . hurleyi, n. sp. base; with apex jagged from long, digiti- 3. Male...... 4 form projections bearing large, sickle- to – Female ...... 6 scythe-shaped, black setae; with short, 4. Tarsus I unmodified . . . carolinensis Van Duzee mostly yellow hairs dorsally and black, – Tarsus I(3–4) compressed, with dorsal lobe . . 5 hooked ventral setae. 5. Gena pointed, fanglike in appearance (Fig. 2A) ...... dracula, n.sp. Female.—Unkown. – Gena absent ...... phyllocerus Vockeroth Holotype.—-, PENNSYLVANIA: 6. Acrostichal setae present only anterior to Centre Co., Black Moshannon State transverse suture . . . phyllocerus Vockeroth Park, Moss-Hanne Trail, Shirks Run, – Acrostichal setae extending to posterior 1,900’ elevation, June 18 2007 (J. B. slope of scutum ...... 7 7. Tibia I with row of about 3 long (5 Runyon); N 40u53.3969,W78u02.5849, distinctly . width of tibia) anterodorsal from vegetation in wooded swamp setae confined to basal 1/2 ...... (USNM)...... carolinensis Van Duzee Etymology.—I take great pleasure in – Tibia I with row of at least 4 (usually 5–6) naming this species in honor of my anterodorsal setae full-length ...... teacher, colleague, and friend, Richard ...... dracula Runyon L. Hurley. Without Dr. Hurley, I would Dolichopus frosti Runyon, new species not know the joy of flies. (Fig. 4) Remarks.—Dolichopus hurleyi belongs to the distinctive group containing D. Male.—Body length 4.75–5.25 mm; dracula, except in lacking the slightly wing length 3.5–4.0 mm. Face rather raised, minutely pilose area near 1/2 on wide for a male (width . length of first posterior surface of tibia III (D. hurleyi flagellomere of antenna); with dense has only slightly smaller and denser setae silver pollen and varying amounts of in this area). The single specimen was pale yellow pollen usually most evident collected from a skunk cabbage leaf in a below antennae and on lower face. Front shaded swamp. Males of D. hurleyi metallic blue green, with very sparse, would key in Van Duzee and Curran yellow brown pollen. Palpus dark yellow, (1934a) and Robinson (1964) to D. with very sparse silver pollen. Proboscis dorycerus. The key below separates these black. Antenna wholly black; first fla- species. Dolichopus hurleyi further differs gellomere about as long as wide, broadly from D. dorycerus in color and width of triangular, with narrowly rounded apex. face (narrow, golden in dorycerus); hav- Dorsal 1/3 of postocular setae black, ing much smaller lobes on tarusus I(3–4); ventral 2/3 whitish. having narrower, completely haired aris- Scutum metallic green with bronze tal lamella (dorycerus lamella haired on reflections; anteriorly with 2 bronze apical 1/2 or less); lacking enlarged costa stripes bounding rather long (5 1/2 VOLUME 110, NUMBER 2 371

Fig. 4. Dolichopus frosti, male genitalia, left lateral view (part of cercus not shown to expose inner appendages). apv lobe 5 apicoventral epandrial lobe; bv lobe 5 basiventral epandrial lobe; cerc 5 cercus; dsur 5 dorsal lobe of surstylus; vsur 5 ventral lobe of surstylus. length of dorsocentral setae), biseriate anteroventral, and row of short (# width acrostichal setae. Pleura and metepi- of tibia) ventral setae on basal 1/2, the meron metallic blue green, with moder- apicalmost seta in this row noticeably ately dense to dense, silver gray pollen. larger. Tarsi unmodified. Tarsus I and II Coxae concolorous with pleura, with black from apex of basitarsus. Tarsus III their tips narrowly yellow. Coxa I with wholly black. Ratio of tibia:tarsomeres black hairs on dorsal surface, except for leg I: 30-14-5-4-3-4; for leg II: 42-22- anterodorsally on basal 1/4 to 1/3 where 12-10-6-5; for leg III: 46-18-20-12-8-6. hairs wholly pale; with black setae at Wings similar to those of D. sincerus apex. Femur II and III with preapical Melander (see Van Duzee et al. 1921) anterodorsal seta. Femur I and II wholly except costa not or scarcely enlarged at yellow; femur III yellow with apical 1/4 apex of R1. Hyaline, slightly grayish. to 1/3 black, blackened area beginning at Veins R4+5 and M1 convergent at apex; or just basal to insertion of preapical seta ending anterior to tip of wing. Posterior but not reaching wholly yellow ventral margin of wing with small notch at apex surface. Tibia I and II wholly yellow; of CuA1; anal angle not prominent, tibia III dark brown to black on apical 1/ evenly rounded. Calypter and halter 5 to 1/6, with ventral surface usually yellow, former with black setae. yellow to apex. Tibia I with 2–3 ante- Abdomen metallic blue green with rodorsal setae on basal 1/2, with ante- coppery reflections along posterior mar- rodorsal row of short (, width of tibia) gins of terga; with moderately dense, setae on apical 1/2; with 2 posterodorsal, silver pollen laterally. Abdominal ster- and 1 posterior setae. Tibia II with 4–5 num 2 with rather long (almost 5 length anterodorsal, 2 posterodorsal, 1 antero- of longest dorsal seta on coxa III), pale ventral, and 2–3 anterior setae. Tibia III hairs ventrally. Hypopygium (Fig. 4) with 5–6 anterodorsal, 5 posterodorsal, 1 black; small for a Dolichopus, with cerci 372 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON projecting anteriorly beneath abdomen – Hypopygium small; cerci projecting anteri- only to anterior margin of abdominal orly beneath abdomen only to anterior frosti tergum 4. Epandrium a little longer than margin of tergum 4 ...... , n. sp. wide; with basiventral epandrial lobe Dolichopus frosti also differs from D. bearing patch of short hairs and 1 seta; sincerus in having a much wider face (in apicoventral epandrial lobe subquadrate sincerus, width of face distinctly , length apically, with two apical setae, one very of first flagellomere); with costa not to thick and abruptly tapering to a sharp indistinctly enlarged at apex of R1 point. Ventral lobe of surstylus with dorsal (sincerus has a small, but distinct en- hump; with short, stout seta at apex; largement); abdominal sternum 2 with coveredwithsmallhairsonapical1/3to long hairs ventrally (sincerus with very 1/4. Dorsal lobe of surstylus larger than short hairs ventrally on sternum 2); and ventral lobe; apically with a rather pointed in lacking a broad, lustrous, poster- dorsal projection. Cerci (Fig. 4) somewhat odorsal spur at apex of tibia III. The triangular; brownish yellow, with broad, cerci of D. sincerus are more elongate, black border; with posterodorsal corner with much longer digitiform projections jagged from short digitiform projections posterodorsally at apex. Dolichopus sin- bearing about 8 large, sickle- to scythe- cerus also lacks the hairs on the basiven- shaped, black setae; with medial surface tral epandrial lobe and on the ventral bearing numerous, hooked setae on ven- lobe of surstylus that are present in D. tral 1/3 (most dense anteroventrally). frosti. Female.—Unkown. Eighteen females which key in Van Holotype.—-, PENNSYLVANIA: Duzee and Curran (1934b) to D. sincerus Centre Co., Black Moshannon State Park, were collected in these series, and assum- Moss-Hanne Trail, Shirks Run, 1,900’ ing females of D. frosti are represented, I elevation, July 23 2006 (J. B. Runyon); N can find no reliable way to distinguish 40u53.3809,W78u02.6299, muddy trail them from females of D. sincerus. through sphagnum bog (USNM). Paratypes.—PENNSYLVANIA: 3 -, ACKNOWLEDGMENTS same data as holotype; 4 -, same data as holotype, July 26 2007 (CNC, FEM, I thank Richard L. Hurley (Montana MTEC). State University) for many helpful dis- Etymology.—The name of this species cussions and comments on the manu- honors Stuart W. Frost who played a script; Greg Hoover (Pennsylvania State pivotal role in establishing the Frost University) for help preparing the pho- Entomological Museum at Pennsylvania tos; Jim Frazier and K.C. Kim (Penn- State University, and contributed many sylvania State University) for comments insects to the collection, including the on the manuscript; Norman E. Woodley first specimens of Dolichopus dracula. and Gary Ouellette (Systematic Ento- Remarks.—Dolichopus frosti keys (Van mology Laboratory, USDA; USNM) for Duzee and Curran 1934a; Robinson 1964) loan of specimens; and Scott Brooks to the closely related D. sincerus Melan- (CNC) for advice on preparation of the der, with which it was collected. Dolicho- figures. Specimens were collected in pus frosti can be distinguished from D. Black Moshannon State Park with col- sincerus using the following couplet: lecting permits (2005-01 and 2006-01) issued by Pennsylvania Department of a. Hypopygium of normal size, cerci project- Conservation and Natural Resources ing anteriorly beneath abdomen to coxa through the Entomological Society of III...... sincerus Melander Pennsylvania. VOLUME 110, NUMBER 2 373

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