Thevenetimyia australiensis Hall, 1969

Li, Xuankun, Rodrigues, Paula Fernanda Motta, Lamas, Carlos José Einicker & Yeates, David K., 2018, A Review of the Australian Species of Thevenetimyia Bigot, 1875 (Bombyliidae, Bombyliinae, Eclimini), with Description of Four New Species and the Pupal Case of T. longipalpis (Hardy), Records of the Australian Museum 70 (3), pp. 331-375 : 335-337

Thevenetimyia australiensis Hall, 1969

Figs 1–3 , 31

Thevenetimyia australiensis Hall, 1969: 25 . Type-locality: New South Wales, Australia; holotype, ANIC .

Types and other specimens examined. Holotype ♂, Australia, NSW, Hanging Rock , 20 Dec 1959, E. F. Riek, ANIC 29-009849 ( Fig. 1 ). NSW, 1♀, Mt Kaputar NP, 1370 m, 11 Jan 1978, G. Daniels, AM K.308712; 1♀, Mt Kaputar NP, 1370 m, 12 Jan 1978, G. Daniels, AM K.308713. QLD, 1♂ 1♀, Brisbane , Mount Coot-tha , 27°29'S 152°57'E, 20 Sep 1997, C. Lambkin, ANIC 29-038898 , 29-038899 ; 1♂, Brisbane, Mount Coot-tha , 27°29'S 152°57'E, 8 Sep 1997, C. Lambkin, ANIC 29-038900 ; 2♂♂ 1♀, Brisbane, Mt Coot-tha, hill-topping, 27°29'S 152°57'E, 170 m, 8 Sep 1997, J. & A. Skevington, ANIC 29-038901 ; 1♂, Glass House Mts, 26°54'S 152°57'E, 6 Oct 1991, G. R. Clemson, AM K.364585. VIC, 1♂, 9 km N Bruthen, 37°38'S 147°53'E, 8 Feb 1992 G. Daniels & C. J. Burwell, AM K.364584.

Diagnosis. Medium-sized Thevenetimyia , wing membrane mostly infuscated except basal area hyaline, the area around crossvein r-m area and the anterior-distal area dark brown; costa with two rows of small spines; scutum with two rows of small short spines on anterior half; posterior margin of abdominal tergites 1 to 4 and posterior half of abdominal tergite 5 with long white scales.

Redescription. Male. Body length 9.1–14.0 mm, wing length 7.4–11.9 mm.

Head. Head about 1.6× wider than long, mostly blackish with thick pale pruinescence and covered in admixed white to blackish brown hairs. Eye narrowly separated, by 0.1× width of ocellus. Frons slender and long, upper triangular section small, lower triangular section pale, middle narrow part about 0.6× length of frons. Ocellar tubercle slightly raised, black to dark brown with grey pruinescence, with blackish brown hairs. Face with thick pale pruinescence and with few black hairs on laterodorsal area, parafacial area dark yellow and bare. Gena with thick pale pruinescence and long white hairs. Clypeus swollen, with thin pale pruinescence and long white hairs. Occiput with long white hairs except dorsal margin admixed with brown to black hairs. Posterior eye margin slightly sinuous.Antennae blackish brown; scape and pedicel with thin pale pruinescence and brown hairs, ventral hairs of scape longer, hairs on pedicel short. Scape 2.7× as long as wide, and 2.4× as long as pedicel, uniform from base to apex. Pedicel 1.1× as long as wide. Flagellum 5.3× as long as wide, 1.3× as long as scape+pedicel (1.8× as long as scape), conical and slightly laterally compressed, one-segmented with apical style ( Fig. 1c ). Palp thin and long, extending beyond oral cavity, black with blackish brown hairs, two-segmented, with palpal pit. Mouthparts slender, 2.6× as long as eye length (1.6× as long as head length), labella thin and filiform ( Fig. 1f ).

Thorax. Integumental colour of scutum and scutellum mostly black with sparse grey pruinescence, pruinescence more dense around margins. Scutum and scutellum with admixed white scales and pale yellow and brown hairs. Four notopleural setae present. Postalar callus and posterior margin of scutellum with strong hairs. Notopleural setae and strong hairs on postalar callus and scutellum pale yellow. Scutum with two rows of small short spines on anterior half. Pleura and coxae black with thick grey pruinescence, anepisternum with admixed white and pale yellow hairs, katepisternum with few long white scales on dorsal and posteroventral area, metepisternum with dense long white scales, and mediotergite with dense white hairs and setae, anepimeron, meron and laterotergite bare.

Legs. Legs mostly dark yellow, except femora with black apex, tarsi blackish brown. Femora and tibiae mostly covered with brownish-yellow scales. Posterior face of fore and mid femora covered with white scales, and with fine yellow hairs on ventral and posterior face. Hind femora covered with few admixed white and black scales. Other hairs and bristles on legs short and blackish brown to black. Fore tibia 2.0× longer than fore basitarsus, mid tibia 2.0× longer than mid basitarsus, hind tibia 1.8× longer than hind basitarsus.

Wings. Wing membrane mostly infuscated except base area hyaline, the area around crossvein r-m and anterior-distal area dark brown. Cell r 5 widely open; cell br much longer than cell bm, crossvein r-m arising a little over half way from the base of cell dm; crossvein m-m long, and 2.0× as long as crossvein r-m; cell cup open ( Fig. 1d ). Costa with two rows of short, thick spines. Haltere stem yellow, knob blackish brown.

Abdomen. Integumental colour of tergites black with thin pale pruinescence. Tergites covered with admixed white hairs and long black scales, posterior margin of tergites 1 to 4 and posterior half of tergite 5 with long white scales. Sternites with dark brown integumental colour except posterior margins yellow, with thick grey pruinescence and white hairs. Genitalia. Epandrium wide and short, posterior margin slightly convex ( Fig. 3d ). Hypandrium present. Gonocoxal apex slightly narrower than the base in dorsal view, ejaculatory apodeme relatively small ( Figs 3a, b ); gonocoxal apodeme strong and incurved; lateral ejaculatory process strong, 1.7× longer than wide, apex expanded; inner apex of gonocoxite rounded, elongate and broad; outer apex of gonocoxite rounded; dorsal bridge with long lateral hollow ( Fig. 3c ); gonostylus slender and pointed dorsally, 3.7× longer than wide.

Female. Body length 9.9–10.0 mm, wing length 8.3–9.1 mm. Very similar to male, except frons black with thick pale pruinescence, 2.5× as wide as ocellar tubercle, frons with short black hairs on dorsal half ( Fig. 2d ). Wing membrane infuscated lighter than male, the crossvein r-m area and anterior margin slightly darker. Costa without small spines ( Fig. 2c , 31a ). Posterior margin of tergite 7 with slender dorsal median apodeme. Tergite 7 with ventral spines. Tergite 8 with a row of sparse hairs, 9 acanthophorite spines present, lateral spines long, spines in middle short, apex of spines expanded. Furca broad and connected at apex. Sperm pump strong and nearly as long as furca, not clothed in longitudinal muscle or lateral papillae; distal spermathecal duct short but strong; spermatheca elongate, cylindrical, base slightly swollen ( Fig. 3g ).

Remarks. Thevenetimyia australiensis Hall, 1969 is redescribed, the female described for the first time, and images of external and internal characters provided.

Distribution. NSW, QLD, VIC.

lateral; (f) head, frontal; (g) head, profile. Scale bars = 1 mm.

Figures

Figure 1. Thevenetimyia australiensis Hall, 1969 ♂ (holotype): (a) dorsal; (b) lateral; (c) flagellum; (d) wing; (e) head, dorsal; (f) head, lateral; (g) head, frontal; (h) head, profile. Scale bars = 1 mm (a, b, d–h); = 0.1 mm (c).

Figure 2. Thevenetimyia australiensis Hall, 1969 ♀: (a) dorsal; (b) lateral; (c) wing; (d) head, dorsal; (e) head,

Figure 3. Thevenetimyia australiensis Hall, 1969 Genitalia (a–e (♂); f, g (♀)): (a) genital capsule, dorsal;(b) genital capsule, ventral;(c) genital capsule, lateral; (d) epandrium, dorsal; (e) epandrium, lateral; (f) sternite 8, ventral; (g) genitalia and spermathecae.Scale bars = 0.1 mm.

Figure 31. Thevenetimyia australiensis Hall, 1969, SEM:(a) female wing costa;(b) male wing costa;(c) male scutum, showing scratches; (d) male scutum, showing modified base of microtrichia.