Ommatius (Pygommatius) strigiatus Scarbrough & Marascia 2003, sp. n.
Creators: name: Scarbrough, Aubrey G.
name: Marascia, Claudio G.
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Ommatius
Ommatius strigiatus

description: Ommatius (Pygommatius) strigiatus, sp. n.
Figs. 20, 27, 37, 47, 210­217
Male. Black. Length, body 8.1­9.5 mm; wing 5.7­6.7. Head: Yellowish­gray to gray tomentose, white setose. Face with sparse, short setae dorsally, longer and slightly more abundant setae ventrally; 4 pencil­like white bristles ventrally and 6 thin, black bristles present; FHWR 1.0:5.9­1.0:6.1. Frons dull brown to brown­yellow tomentose. Antenna with pedicel swollen, wider and slightly longer than flagellum. Ocellar tubercle with 2 posterior setae as long as 3 antennal segments combined. Occiput with 4­5 black postocular bristles dorsally, tip of longest bristle about third distance toward ocellar tubercle.
Thorax: Mesonotum subshiny, mostly brown tomentose, grooves, sides, and posterior brown­yellow to yellowish­gray; setae mostly black, sparse, scattered anteriorly; white setae abundant laterally, especially long on postpronotum and between rows of dorsocentral bristles posteriorly; 4­5 lateral and dorsocentral black bristles present. Scutellum brown­yellow tomentose dorsally, gray apically with scattered, long, white setae; 2 black marginal bristles and a shallow preapical groove present. Pleuron black, mostly gray tomentose, with scattered, white setae and bristles; anepisternum yellowish­gray. Halter yellow.
Wing (Fig. 20): Apical and posterior margins narrowly dense microtrichose. Cell r 4 uniformly narrow beyond base to wing margin. Apex of cell m 3 perpendicular to long axis of wing, just beyond crossvein r­m.
Leg: Coxae and trochanters black, former gray tomentose with white setae. Femora mostly yellow; fore and middle femora anteriorly mostly black; hind femur with apical half black, at least dorsally. Fore and middle femora basally with 4­6 thick, yellow bristles, the basal bristle unusually long, about half as long as fore femur (Fig. 27), each bristle thereafter shorter and thinner; middle femur with bristles much thinner, shorter than on fore femur. Hind femur (Fig. 37) narrow basoventrally, widest on basal one­fifth; 1 short setigerous bristle and 6­8 long, thin, yellow anteroventral setae present; 5­7 short, peglike, black bristles basoposteriorly and 2 long, brown, bristles present preapically; HFWLR 1.0:4.4­1.0:5.0. Tibiae yellow with dark apex, fore tibia sometimes entirely yellow; lateral bristles yellow. Hind tibia (Fig. 47) shorter than hind tarsus; apically, a short flange terminates in a raised anterior spur and a small tubercle present, each with a black bristle. Tarsi mostly black except basal tarsomeres mostly yellow; bristles black except 1 fore tarsal bristle yellow; basal tarsomere of middle tarsus laterally with row of short, closely spaced, bristles.
Abdomen: Constricted apically, segments 6­8 about half as wide as segment 2. Ground color black with apical margins of most segments brownish­yellow; tomentum mostly brown dorsally, lighter brownish­gray laterally and ventrally; mostly white setose, tergites black setose medially. Sternite 4 laterally with 6­7 white bristles; sternite 5 with row of very short bristles, each very light in color and with a large socket, the row ends apically with a small oval patch of 7­8 very short black and white bristles; sternite 6 with numerous white bristles, those of sternite 8 apically contrastingly long.
Terminalia (Figs. 210­214): Ventral lamellae basally with ear­like process; process dense setose. Epandrium 2 branched; dorsal branch apically narrow, podiform; ventral branch forked apically. Gonocoxite with internal flange fused with external surface, not projecting posteriorly. Aedeagal sheath projecting above distiphallus as a flat, grooved, oval plate. Hypandrium with extremely narrow, pointed, drooping apex; surface with minute grooves and ridges.
Female. Differs from male as follows. Length, body 6.7­11.5 mm; wing 5.9­7.7 mm. Head: FHWR 5.6­1.0:6.7. Leg: Fore and middle femora basally with only 3­4 long, thin setae. Hind femur anteroventrally with 4­5 bristly setae, longest as great as width of femora medially; HFWLR 1.0:5.9­1.0:6.0. Middle tarsus anteriorly with only 3 short bristles. Abdomen: Bristle pattern of sternites 4­6 absent. Cercus longer than tergite 9. Terminalia (Figs. 215­217): Three spermathecae present; duct basal. Apical margin of sternite 8 with notch admedially.
SPECIMENS EXAMINED. Holotype ♂, allotype ♀, SOUTH AFRICA: N­W Province / Pilanesberg National Park / Bakiburg 25 o 20’40”S 27 o 03’25”E 1170 m Camp / 12­ 19.xi.1999 / JGH Londt (NMSA). Paratypes: BOTSWANA: 1 ♂, Serowe / Farmer’s Brigade / x. 1991 SE2226BD / Per Forchammer / Malaise Trap (CMNH); 2 ♂, Serowe # 56 / Farmer's Brigade / 22° 25 S: 26° 14' E 1000 m / 28.xi.1990 / D. Forchhammer / malaise trap (NMSA). SOUTH AFRICA: 4 ♂, 3 ♀, same data as holotype (NMSA).
Distribution. A species captured in November at 1000 meters in Botswana and South Africa.
Etymology. Latin, strigiatus, for grooves and ridges, referring to the surface of the hypandrium.
Remarks. In addition to the characters in the key, the uniformly narrow cell r 4 (Fig. 20) and short tibia (Fig. 47) further characterize O. strigiatus.
description: Published as part of Scarbrough, Aubrey G. & Marascia, Claudio G., 2003, Revision of Ommatius Wiedemann (Diptera: Asilidae). IV. Pygommatius subgen. nov. with twenty-five Afrotropical species, pp. 1-94 in Zootaxa 228 (1) on pages 56-57, DOI: 10.11646/zootaxa.228.1.1, http://zenodo.org/record/5019043