Genea gracilis James, 1947

Nunez, Enio & Couri, Márcia S., 2011, Revision Of Neotropical Genea Rondani (Diptera, Tachinidae, Tachininae, Leskiini), Papéis Avulsos de Zoologia 51 (31), pp. 481-497 : 485-487

Genea gracilis James, 1947

(Figures 8-11)

Genea gracilis James, 1947: 111-112 (original description of male and female); Guimarães, 1971: 116 (catalogue).

Diagnosis: Males with 9-12 pairs of frontals, females with 7-10 pairs, 1-2 pairs below the level of the antennal insertion; weak ocellars; outer verticals not diferentiated in both sexes; palpus long with 1.5 times the length of the flagellomere; proboscis long, with 1.5 times the head height, tapering to tip and dark on the apical half; wing vein R 1 entirely setulose and vein R 4+5 setulose from base to crossvein r-m; scutellum yellowish; pair of discal setae absent or weak; yellow abdomen with median apical brown spots dorsally, almost like a dorsal stripe, fused with lateral brown spots on T 3 and T 4; median marginal setae absent on T 1+2 and T 3; marginal rows on T 4 and T 5.

Male: Body length, 5.0-8.0 mm; wing, 4.0-7.0 mm.

Head: White; parafrontal with golden pruinosity; eyes almost bare; 9-12 pairs of frontal setae, 1-2 pairs below the level of antennal insertion; weak ocellars; frons with 0.20 of head width at the level of the anterior ocellus; inner verticals present, outer verticals not differentiate from postoculars in either sex; antenna yellow, flagellomere brown, yellow on base; arista slightly plumose; proboscis long with 1.5 times the head height (Fig. 8), tapering to tip and dark on apical half; long vibrissa; 3-5 pairs of subvibrissals, short- er near vibrissa; 1-2 pairs of setulae above vibrissa; palpus long with 1.5 times the length of the flagellomere.

Thorax: Brown in ground colour with white and golden pruinosity; dorsocentrals 2+3; post-pronotals 1+2; scutellum with one pair of basal setae; one pair of subapical setae and one pair of weak discal setae or discals absent; pleura brown (except for yellow postpronotal lobe) with a dense white pruinosity and long yellow setulae. Wing and calypter slightly infuscated, vein R 1 entirely setulose and vein R 4+5 setulose from base to crossvein r-m. Legs with coxa, trochanter and femur yellow except for the hind femur slightly brown on apical third; tarsus brown; fore tibia with 1 long posterior seta on middle third; 1 dorsal subapical seta; 1 posteroventral apical seta; claws and pulvilli well developed; mid femur 2-6 sparse and long posteroventral setae on basal half; 2 posterodorsal setae on apical third; mid tibia with 1 strong anterodorsal seta and 1 strong ventral seta on middle third; 2 posterior setae on middle third; 1 anterodorsal and 1 posterodorsal subapical seta each; 1 anteroventral, 1 ventral and 1 posteroventral apical seta each; hind femur with 2 posterodorsal setae on apical third; 4-6 anteroventral setae on basal half and 1 anteroventral seta on apical third; 6-8 sparse posteroventral setae on basal half; hind tibia one posterodorsal row of setae on middle third; 3-4 ventral setae on middle third, the apicad the largest; 1 anterodorsal and 1 posterodorsal subapical seta each; 1 ventral apical seta.

Abdomen: Yellow; T 1+2 not excavate to its hind margin and with a brown spot dorsally; T 3 and T 4 with median apical brown spots dorsally, almost like a dorsal stripe, fused with the lateral brown spots; T 5 with lateral brown spots; median marginals absent.

Male terminalia (Figs. 9-11): Sternite 5 as described for genus; cerci not fused; surstylus similar in length with cerci and slightly curved towards the cerci tip; distiphallus with lateral arms short; pregonite triangular

in lateral view with a few setulae at tip and postgonite narrow, apically curved downward and pointed.

Female: Differs from male as follows: 1 pair of proclinate and 1 pair of reclinate orbital setae; frons with 0.35 the head width at the level of the anterior ocellus; palpus slightly clavate; claws and pulvilli short.

Type material: Paratypes. BRAZIL. Santa Catarina: Nova Teutônia , 1 male, 11.v.1939, Fritz Plaumann, col. ( USNM); 1 female, 31.v.1939, Fritz Plaumann, col. ( USNM) .

Other material examined: BRAZIL. Santa Catarina: Nova Teutônia , 1 male, vii.1967, Fritz Plaumann, col. ( MZSP) .

Geographic distribution: Brazil.

Comments: It is a delicate fly with long proboscis, tapering to tip; wing vein R 1 setulose on dorsal surface and vein R 4+5 setulose on dorsal surface from base to crossvein; it is the only species of Genea without median marginals on T 3.