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New and Old Species of Ommatius Wiedemann (Diptera: Asilidae) from Hispaniola

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New and Old Species of Ommatius Wiedemann (Diptera: Asilidae) from Hispaniola INSECTA MUNDI, Vol. 11, No.1, March, 1997 9 New and old species of Ommatius Wiedemann (Diptera: Asilidae) from Hispaniola A. G. Scarbrough Department of Biological Science Towson State University Baltimore, MD 21204 Abstract: Four new species of Ommatius Wiedemann, the female of 0. stramineu.s Scarbrough,and the maleof 0. nigellu.s Scarbrough from Hispaniola are described. A lectotype for O. gioenae Scarbrough and a neotype for O. cinncmomeus are selected. Notes of previously named species, new records, illustrations ofterminalia, and a key to the species are included. Key Words: Asilidae, Ommatius Wiedemann, new species, Hispaniola Introduction section of male terminalia was required for exami­ Ten species of Ommatius have been reported nation of the aedeagus. Illustrations were made from Hispaniola, eight modern species (Scarbrough using an ocular grid and graph paper under a 1984) and 2 extinctspecies (Scarbrough and Poinar stereoscopic dissecting microscope. Figures 1-10 1992). Recently, new material was collected by list standard measurement scales and abbrevia­ Mike Ivie of Montana State University and Robert tions of the structures of terminalia unless indicat­ Davidson and Chen Young of the Carnegie Muse­ ed elsewhere. Anatomical terminology used in this um of Natural History. These included 4 new spe­ study follows McAlpine (1981). cies, the male of 0. nigellus Scarbrough, and the The most frequently used measurements and female of 0. stramineus Scarbrough. With these ratios are defined as follows: Body length = A additions, 14 species are now known from this straight line distance between the anterior margin island, representing at least 4 natural species of the face and the apex of the terminalia. Wing groups. Each group will be treatedata later time as length = The distance from the base of the costal a revision of the genus progresses. To provide vein to the apex of the wing. Wings were defined as names of species for studies in progress, I describe being produced or dilated when their maximum here the new material, and include additional breath occurred beyond the junction of the subcos­ records and notes on previously named species to tal and costal veins; wings with a more or less supplement original descriptions. Illustrations of straight costal margin have the greatest breath terminalia of most known species, and a key to all before this junction. Face-to-head width ratio known species are also included. Additionally, the (FHWR) = Greatest width of head (as measured holotype and allotype of Ommoiius guienae Scar­ horizontally from outer margin of one eye to the brough and the holotype of 0. cinnamomeus Scar­ other) divided by greatest width of the face at base brough were destroyed by dermestid beetles after of antenna. Flagellum width-to-length ratio the original description of the species. Thus, a (FWLR)= greatest length divided by greatestlater­ lectotype of O. guienae and a neotype of 0. cinna­ al width. Hind femur width-to-length ratio (HF­ momeus are designated. WLR)= dorsal length ofhind femur measured from trochanter to apex divided by greatest vertical Materials and Methods width. Cell ml Width Ratios (ml WR)= width of General methodology usedin this studyfollows basal 1/3 and apical 1/3 divided by basal width. Scarbrough (1990, 1993). Terminalia were cleared Ratios are given as ranges in the text. in warm KOH for 10-12 hours, neutralized with Collection and locality data of all species are glacial acetic acid in ETOH for 5 minutes, and standardized in the text, and listed sequentially by placed in glycerol for 24 hours. In most cases, this country, numbers, sex, specific location, elevation, procedure permitted clear viewing of the internal date, collector, and museum. Curators and acro­ structures of the female terminalia. Further dis- nyms of museums who loaned specimens to me are 10 Volume 11, No.1, March, 1997, INSECTA MUNDI as follows: Randall Schuh, American Museum of 7. All tibiae entirely black; front coxa with few to several, Natural History (AMNH), New York, NY.; Robert long, thin, black bristles; face with mostly to Davidson and Chen Young, Carnegie Museum of entirely black setae and bristles; terminalia as Natural History (CMNH), Pittsburgh, PA.; Monty in Figs 50-59 nigellu.s Scarbrough. tibiae with at least basal 1/2 yellow; front coxa Woods, Canadian National Museum (CNC), Otta­ - All with numerous, thick, whitish bristles; face wa; Stefen Cover, Museum of Comparative Zoology with mostly whitish or yellowish bristles and (MCZ), Cambridge, MA; Mike Ivie, Department of setae 8 Entomology, Montana State University (MSU), Bozeman, MT.; Museum of Zoology, Towson State 8. Hind femur ventrally with 3 to 4 black bristles; male University (TSU), Baltimore, MD.; George Gavin, with costal margin of wing moderately to strong­ Hope Entomological Collections (OXUM), Oxford, ly dilated; apex ofepandrium pointed, not bifur­ England; F. Christian Thompson, Systematic En­ cate; hypandrium with a transverse band of tomology Laboratory, USDA, ARS, at the United black setae russelli Scarbrough. Hind femur ventrally with only whitish bristles; male States Natural Museum (USNM), Washington, D. - with costal margin of wing straight, without a C. dilation; apex of epandrium strongly bifurcate; hypandrium with only scattered setae; termi- Key to the known species of Ommatius from nalia as in Figures 77-86 oitreu.s Bigot. Hispaniola 1. Scutellum with marginal bristles 2 9. Face yellow tomentose; mesonotum with only very - Scutellum without marginal bristles 4 thin, short, dorsocentral setae; hind femur with onlyyellowish bristles; scutellum with a proapi­ 2. Fore coxae and femora entirely black; hind femur of cal groove; male with costal margin of wing male with HFWLR 1/3.6-1/5.0; moderate to moderately dilated; terminalia as in Figs 67-76 large (11-25 mm), robust species 3 ................................... stramirieu.s Scarbrough. - Fore coxae yellow, femora partly yellow, base and - Face white to yellowish white tomentose; mesonotum preapical band of hind femur yellow; hind with 2 to 4 pairs of thick, dorsocentral bristles; femur of male with HFWLR 1/6.9; smaller (8.0­ hind femur ventrally with 3 to 4 black bristles; 9.1 m m), slender species; terminalia as in Figs scutellum without a distinct preapical groove; 40-49 lucidatue, new species male with costal margin of wind moderately dilated; terminalia as in Figs 1-7 . 3. Flagellum long, about 3 times as long as wide; body ........................................ airosu.s, new species. with abundant, long vestiture; entire face with dense, mostly or entirely, black bristles and 10. Basal 1/3 or more of mid and hind femora yellow to setae; male with costal margin ofwing straight; red; male with costal margin of wing sometimes terminalia as in Figs 21-29 .. slightly dilated; scutellurn with only yellowish ...................................... haitiensis Scarbrough or whitish setae 11 - Flagellum oval, about as long as wide; body with - Mid and hind femora largely black, at most narrow sparse bristles and setae, none unusually long bases reddish; male with costal margin of wing or abundant; face with only white bristles and moderately dilated; scutellum with abundant, setae; male with costal margin of wing moder­ black setae russelli Scarbrough. ately dilation; terminalia as in Figs 60-66 ...... .............. puloerius, new species 11. Basal tarsomere of hind tarsus largely yellow to light brownish yellow; mid femur of male with 3 to 5 4. Femora largely yellow, apical 1/4 to 1/3 black; large short, thickposteroventral bristles, length about species 16.0-19.0 mm; terminalia as in Figs 8- 2/3 thickness of mid femur; m ale with costal 10 cinnamomeue Scarbrough. margin of wing slightly dilated; terminalia as in - Femora largely or entirely brown or black 5 Figs 30-39 hispaniolae Scarbrough. - Basal tarsomere of hind tarsus entirely black; mid 5. Hind femur usually entirely dark brown to black, at femur with long, bristly, posteroventral setae, most narrow base of hind femur yellow to red length greater than width of mid femur; costal ........................................................................ 6 margin and terminalia not as above 12 - Basal 1/4 or more of hind fem ur yellow to red ..... 10 12. Large (14.3-18.5 mm), robust species; fork of vein 6. Face with only whitish or yellowish bristles and setae R4+5 just beyond base of cell m 1; male with ........................................................................ 9 costal margin moderately dilated; mid femur of - Face with at least a few, black bristles and setae. 7 male with several long bristles; terminalia as in Figs 11-20 gwenae Scarbrough. INSECTA MUNDI, Vol. 11, No.1, March, 1997 11 - Smaller (11.0-15.0 m rn), more slender species; fork of tum dorsally; terga 5 to 8 with sparse to abundant., vein R4+5 at or before base of cell m 1; male with dark brown to black setae. costal margin of wing straight, without a dila­ Terminalia largely shiny black. Apical 1/3 of tion; mid femur of male with only long, bristly epandrium gradually narrow, apex subtruncat.e. setae; terminalia as in Figs 87-95 . Ventral lamella ventrally with a thick, median ........................................... vivus, new species. spine, apex truncate, and a large ventrolateral, Ommatius atrosus, new species subtriangularplate. Gonostylus flat in lateralview, (Figures 1-7) wide basally, apex with acute point. Aedeagus apically tubular, with a large, dorsal aperture and Male: Black. Body 16.3 mrn, wing 11.7 mm. a wide, ventral, triangular flange. Gonocoxite with Head largely dull yellow gray to grayish tomentose a long, digitate process dorsally, a shorter, much with pale yellow vestiture; front slightly brownish thinner seta ventrally, and an erect, horizontal tomentose; FHWR 1/8.6. Ocellar tubercle and an­ flange. Hypandrium with sparse, thin setae, ante­ tenna with only blackish vestiture; FWLR 1/1.8. rior margin with a small triangular process medial­ Occiput with 6 to 8 dark brown to black, thin, ly. postocular bristles, none exceptionally long, apical Female.
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