Eudorylas semiopacus ( Lamb, 1922 )

FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), Zootaxa 3656 (1), pp. 1-121 : 95-97

Eudorylas semiopacus ( Lamb, 1922)

( Figs 32G–L )

Pipunculus semiopacus Lamb 1922: 409 .

Diagnosis: One anteromedial hair on 3rd tibia. Surstyli short and flat; gonopods with one protuberance each and with 2 distinct hairs; phallic guide with two flat lobes and a pointed tip in median line; phallus trifid and at least one branch with teeth.

Type material: Seychelles: 1♂, LT, Silhouette '08, Seychelles Exp.; Seychelles Is., Pres by Percy Sladen Trust Cttee., B.M. 1922-157; 1♀, PLT, same data, Mahe, '08-9. [as “ 20. ii. 1909 ” in Lamb 1922] (both BMNH) .

Other material examined: South Africa: 1♂, Natal Zululand , Ndumu Game Reserve, 26-X-1972, ME Irwin, 2632 Cc ; 2♂, Transvaal , Kruger National Park, Vicinity of Skukuza, 9–12.iv.1985 J. Londt, SE2431DC, Bushveld ; 1♂, Ndumu Reserve , Ingwavuma District Tongaland, B. & P. Stuckenberg, 1–10 December 1963 ; 1♂, KZ-Natal #117, Hluhluwe / Umfolozi Res. , 28º09’S: 32º02’E, 160m, Date: 29.xii.1995 – 3.i.1996, Coll: J. Londt & K. Cradock, Munyawaneni Camp area (all NMSA) ; 3♂, Natal , Ndumu G. Res. 2632DC, Date: 4–9 Oct 1982, Coll. J.G.H. Londt, Camp + riverine bush (2 NMSA, 1 HNHM) ; 1♂, Transvaal , 8 km NW Barberton on Badplass Rd SE2530DD, 6–8.iv.1985 J. Londt, Bushveld long grass ( HNHM) ; 1♂, Natal , Mtubatuba, III-24&25-1968, Paul J. Spangler ( USNM) .

Male

Head. Third antennal segment acuminate; yellow. Face silvery pollinose. Frons, upper part subshining black, lower part silvery pollinose; eyes touching for distance equal to 3.5 times ocellar triangle. Occiput, lower half silvery pollinose, upper half less so.

Thorax. Humeri yellow. Mesonotum (viewed obliquely from front) subshining black, along anterior margin somewhat grey; silvery pollinose from the side. Scutellum subshining black, with numerous black hairs dispersed on the surface. Dorsocentral hairs present with dark hairs in notopleural depression. Halter yellow.

Legs. Trochanters and base of femora yellow, femora dark brown (posteriorly f1,2 silvery pollinose, f3 shiny), knees, tibiae, all tarsal segments yellow. Ventroapical row of 9–10 short black spines on f1, 14 on f2, 7–8 longer ones on f3. Subapical (distal) spines on first four tibiae absent. One anteromedial hair on 3rd tibia. Hind trochanter with 2–3 whitish hairs on ventral side. Pulvilli longer than last tarsal segment.

Wing. Fourth costal section times as long as third costal section. Cross-vein R-M at 2/5 of discal cell. Pterostigma fully coloured. Hairs on tegula absent.

Abdomen. Viewed obliquely from front tergites brown-black (also hind margins), sides greyish on each tergite posteriorly. Numerous brown hairs dispersed as long as width of t3 at base. Six dark lateral bristles on first tergite. Postabdomen in dorsal view: T5 1.5 times as long as ST8. Genitalia without dissection: SS look wide and flat, m.a. as broad as 2/3 of ST8.

Genitalia. Surstyli short and flat ( Fig. 32H ). SES not developed; gonopods with one protuberance each and with 2 distinct hairs; phallic guide with two flat lobes and a pointed tip in median line ( Fig. 32L ); phallus trifid and at least one branch with teeth; ejaculatory apodeme linear; sperm pump rounded ( Fig. 32K ).

Female

As male except for the following characters. Frons, eyes separated; completely silver-grey pollinose. Pulvilli and claws slightly longer than tarsal segment. Abdominal tergites (from front) subshining black, hind margins laterally greyish, sides silvery pollinose, without hairs. Female ovipositor missing on PLT.

Remarks — Lectotypes are hereby designated in order to stabilise the status of the species. Shape of PG is similar to that of E. garambensis , but GPs are different.

Distribution— Seychelles, South Africa.

Figures

FIGURE 32. Male genitalia of Eudorylas scharffi (A–F) and E. semiopacus (G–L).—A: outer surstylus with phallic guide and outer gonopod, lateral view, B: dorsal view, C: inner surstylus, lateral view, D: surstyli, dorsal view, E: sperm pump with ejaculatory apodeme, F: ventral view with phallic guide, phallus (without ST8), G: outer surstylus with phallic guide, phallus and outer gonopod, lateral view, H: dorsal view, I: inner surstylus, lateral view, J: surstyli, dorsal view, K: sperm pump with ejaculatory apodeme, L: ventral view with phallic guide (without ST8). Scale bars: 0.1 mm