Ommatius maculosus, Scarbrough & Perez-Gelabert, 2006

Scarbrough, Aubrey G. & Perez-Gelabert, Daniel E., 2006, A review of the asilid (Diptera) fauna from Hispaniola with six genera new to the island, fifteen new species, and checklist, Zootaxa 1381, pp. 1-91 : 62-66

Ommatius maculosus sp. nov.

( Table 1, Figs. 47, 57, 75–82)

Male. Black body, apical 1/3 of wing brownish, anepisternum partly shiny black. Measurements, body 9.8–10.3 mm; wing 6.9–7.1 mm. Head: Yellowish-gray or gray tomentose, white setose. Face gradually slanted forward ventrally, lower 1/2 moderately exposed beyond margin of eye, setae about as long as pedicel and scape combined dorsally, much longer ventrally, about 1/2 as long as 6 blackish bristles; face at antenna 1/ 6.1–1/7.0 as wide as head. Antenna black setose; flagellum wide, tear-shaped; style with 6 setae on apical 2/3, basal 3 sequentially shorter than apical setae. Frons yellowish-gray tomentose medially, wide basally, sides slightly convergent dorsally, only slightly wider than shiny black ocellar tubercle. Ocellar tubercle with 4 black setae, 2 stout and long, each about as long as 3 antennal segments combined. Occiput yellowish tomentose dorsally, white ventrally, pale setae, most abundant ventrally, 6–7 blackish postocular bristles dorsally, stout basally, thin apically, proclinate, apex just beyond posterior margin of eye.

Thorax: Prothorax grayish tomentose, whitish setose, with 2 blakish bristles dorsally. Scutum brown tomentose dorsally, postpronotal spot and margins yellowish to grayish setose; setae sparse, sparse white setae, dorsocentrals short, brown; 4 lateral and 3 dorsocentral bristles blackish, each about 1/2 as long as scutum. Scutellum yellowish-gray tomentose with sparse black setae and 2 or 4 marginal bristles, 2 short and thin. Pleura gray tomentose, anepisternum partly shining black; setae sparse, whitish, bristles whitish or dull yellow; halter yellow, base narrowly dull brownish.

Wing ( Fig. 47): Hyaline, apical 1/3 brownish and brown microtrichose. Cell r 4 narrow, base V-shaped, beyond apex of cell d, about 1/5 as wide as cell at wing margin. Cross-vein r-m at apical 1/4–1/3 of cell d. Base of cell m 1 1/3 as wide as width at basal 1/3, slightly constricted beyond. Cell m 3 petiolate, about as long as rm, apex strongly pointed.

Legs: Coxae black, whitish tomentose, whitish setae and bristles. Fore and middle trochanters yellow, narrow apices blackish; hind trochanter entirely blackish. Femora yellowish, black as follows: apical 1/4 or 1/3 of fore and middle femora, and dorsally almost to base, color extending onto anterior and posterior surfaces narrowly; hind femur with base and apical 1/3 banded yellow, bands narrow dorsally, much wider ventrally; setae mostly black; fore femur posteriorly with abundant, hooked, pale setae and ventral row of long setae, shallow groove about 1/2 as long as femur; middle femur with 3 unusually long bristles anteriorly, each about 1/3 as long as femur, ventral setae moderately long, thin; hind femur with pale bristles ventrally, 2 posteroventral bristles exceptionally long, setae black, pale dorsally, numerous bristly, black, posteroventral setae present on apical 2/3; hind femur narrow, 6.0–6.4 times longer than wide. Tibiae mostly yellow, apex and anteriorly brownish, middle and hind tibiae darkest anteriorly, setae and bristles black; fore tibia with sparse long setae laterally, longest and pale on apical 2/3, thin lateral bristles about 1/2 as long as tibia, those on middle tibia black and stout; hind tibia with much shorter bristles and dense yellowish setae ventrally. Tarsi with black vestiture, bristles about 1/2 as long as tarsi, basal tarsomere on fore and middle tarsi mostly brownish-yellow, base of hind tarsus narrowly reddish; second and third basal tarsomere produced, spur-like process lateroapically.

Abdomen: Black, apex and lateral margin narrowly yellowish; tergites 1–6 brownishyellow or brownish tomentose, narrow apices, side of tergite 1, tergites 2–4 basally grayish, tergites 7–8 black, sparsely tomentose; tergites 2–6 with shiny black spot laterally, spot atomentose; tergites black setose except white on tergites 1–2 laterally; bristles usually pale on tergites 1–5 laterally. Sternites ( Fig 57) shiny black, atomentose or sparsely tomentose, narrow lateral margins brownish or pale tomentose, setae and bristles black; sternite 1 grayish tomentose, small oval shiny black spot medially. Sternites 3–4 slightly concave, former scattered, short setae, long black bristle in each apical corner, latter sternite with narrow plate anteromedially, reclinate setae medially. Sternite 5 with broad oval concavity apically, M-shaped ridge basally with fine setae, transverse row of stout, twisted bristles more anteriorly, often capitate; oval plate anteromedially. Sternite 6 with dense vestiture laterally, long stout bristles anteriorly, thin pencil-like bristles medially, acutely pointed thin bristles basally.

Terminalia ( Figs. 75–79): Black, gonostylus minute, distiphallus curved dorsally, apex tubular with flange ventrally. Hypandrium broadly rounded apically.

Female. Body 10.3–10.9 mm; wing 7.3–8.0 mm. Head: Ocellar tubercle with 4–6 setae, longest 3/4 as long as 3 antennal segments combined. Middle femur with bristles short, less than 1/3 its length. Fore tibiae with short lateral fringe, much shorter than in male. Hind tarsus with basal 1/3–2/3 brownish-yellow. Abdomen with tergites 2–7 laterally and sternites 3–7 with large atomentose spots; vestiture normal, without unusual patterns. Terminalia ( Figs. 80–82).

Types. DOMINICAN REPUBLIC: RD-215 – 2 km on trail to / Carlitos, Parque Nacional / Jaragua, Pedernales prov., 124 m, 18 o 06.591'N 71 o 37.234'W, 7.iv.2004, D.Perez, B.Hierro, R. Bastardo (holotype ♂, USNM) . Paratypes, same data as holotype (1 ♂, 2 ♀, USNM) ; Pedernales prov., PN Jaragua / trail to Carlitos, 6 km. S. of / Highway 44, 106 meters, / 17 o 48.932'N 71 o 28.271'W, 9 July, 2004 N.E.Woodley (err., id. O. lucidatus ) (1 ♂, USNM) ; Pedernales prov., 0.7 km N. / Cruce Aguas Negras — Mencia / 18 o 06.956'N 71 o 43.388'W, 326 m / 17.viii.2006, D. Perez, R. Bastardo (1 ♀, USNM) .

Distribution. Captured at low elevations (106–124 m) from April to August in

Pedernales province.

Etymology. Latin maculosus , referring to the black, oval, atomentose spot on the

anepisternum.

Remarks. Ommatius maculosus is distinguished from congeners by the characters in the key, vestiture pattern of the sternites ( Fig. 57), and combined characters of the terminalia ( Figs. 75–82). Additionally, the scutellum has thin marginal bristles in addition to a thicker, longer pair.