Sisyromyia maculipennis, Li & Yeates, 2019

Li, Xuankun & Yeates, David K., 2019, Revision of the Australian bee fly genus Sisyromyia White, 1916 (Bombyliidae, Bombyliinae, Acrophthalmydini), Zootaxa 4711 (2), pp. 201-244 : 222-223

7. Sisyromyia maculipennis sp. nov.

( Figs 15 , 16 )

Type specimens. Holotype ♂ Australia, WA, Albany , S32°22’ E116°14’, Mt. Vincent, 30 Aug 1981, MJ Smart.

Paratype ♂ Australia, WA, same data as holotype .

Other specimen examined. Australia, WA, ♀ -31.0052° 199.212° GE, Bullfinch , off Perilya-Turkey Hill R [oa]d, 29 Sep 2017, JA & JG Lumbers . ♀ -31.9823 116.5095, on Leucopogon , 8 Aug 2018, J & F Hort . ♂ -31.9648 116.5125, open woodland, 11 Aug 2018, J & F Hort . ♂ (8) ♀ (1), -32.0527 116.5557, Leucopogon sp . , 12 Aug 2018, J & F Hort . ♂ (3) ♀ (1), -31.9784 116.5953, Wandoo woodland, 28 Jul 2018, J & F Hort . ♀ (2), -31.9822 116.5879, open woodland, 31 Jul 2018, J & F Hort

.

Diagnosis. Medium-sized fly, body with mostly brownish hairs. Wing membrane darker on anterior half and spotted. Anterior margin of scutellum with a band consisting of short white scales. Male eyes dichoptic; frons short, 1.8 x length of ocellar tubercle. Gap between inner apices of gonocoxites narrow. Lateral margin of gonocoxite strongly curved.

Description. Male. Body length 9.1–9.3 mm, wing length 9.6–9.8 mm.

Head. Head about 2.4 x wider than long, mostly blackish with thick pale pruinescence and covered in admixed white to black hairs and scales. Eyes dichoptic, narrowly separated by 0.2 x width of ocellus. Frons short, 1.8 x length of ocellar tubercle, upper narrow and black; lower half triangular, 1.3 x length of upper half, with sparse pale pruinescence and white scales admixed with black hairs. Ocellar tubercle slightly raised, blackish brown to black with grey pruinescence, with long black hairs admixed with some golden hairs. Face with thick pale pruinescence and long golden hairs admixed with long black hairs, parafacial area with long white hairs. Gena with thick pale pruinescence and long white scales. Clypeus with thick pale pruinescence and otherwise bare. Occiput with thick pale pruinescence and with black hairs. Posterior eye margin slightly convex. Antennal scape and pedicel black with thick pale pruinescence, scape with long black hairs admixed with some golden scales laterally, pedicel with long black hairs; flagellum black without pruinescence, subapex with 3–5 long hairs. Scape 3.0 x as long as wide, and 2.5 x as long as pedicel, uniform from base to apex. Pedicel 1.2 x as long as wide. Flagellum 10.9 x as long as wide, 1.9 x as long as scape + pedicel, 2.7 x as long as scape, conical and slightly laterally compressed, one-segmented with apical stylus ( Fig. 15c ). Palpus long, just extending beyond oral cavity, yellow except brown apically with brown hairs, one-segmented, without palpal pit. Mouthparts slender, 2.9 x as long as eye length, 1.7 x as long as head length, labellum thin and filiform ( Fig. 15h ).

Thorax. Integumental colour of scutum mostly black with thick grey pruinescence, except postalar callus brown, dorsocentral brown pruinescence present. Scutum covered with short brown hairs admixed with few black hairs, hairs denser anteriorly, indistinct lateral stripe consisting of long white scales. Two brownish yellow notopleural setae present. Scutellum black with sparse pale pruinescence, and thick brown pruinescence on posterior margin, anterior half with a band consisting of short white scales, posterior half with long black hairs admixed with some brown hairs, hairs denser on posterior margin. Pleura black with thick pale pruinescence, mostly covered in long white hairs, except dorsal half of anepisternum with brown hairs, anepimeron, meron, laterotergite and mediotergite bare.

Legs. Legs mostly brown. Femora covered in white scales, ventral face admixed with long brown hairs. Mid and hind femora with two anteroventral bristles on apical half. Bristles and other hairs on legs brown. Fore tibia 2.2 x longer than fore basitarsus, mid tibia 2.4 x longer than mid basitarsus, hind tibia 2.1 x longer than hind basitarsus.

Wings. Wing membrane slightly infuscated and darker on anterior half, with markings on the area around base of vein R 4, crossvein m-m, crossvein dm-cu and apex of cell bm and cell br. Cell r 5 open, M 1 close to R 5; cell br nearly as long as cell bm, crossvein r-m arising from base of cell dm; crossvein m-m nearly as long as crossvein r-m; cell cup open; stump vein present on anterior margin of R 4 ( Fig. 15d ). Haltere stem brown and knob dark yellow.

Abdomen. Integumental colour of tergites black with thick grey pruinescence. Tergite 1 with dense yellow hairs; tergites 2–7 with long brown scales admixed with long black hairs, and with median stripe consisting of dense, decumbent short white scales. Sternites black except posterior margin yellow, with thick pale pruinescence, covered with long white hairs admixed with few black hairs. Genitalia. Epandrium anterior margin slightly concave, posterior margin straight ( Fig. 16d ). Lateral margin of gonocoxite strongly curved ( Figs 16a,b ); lateral ejaculatory process wide; inner apices of gonocoxite short and rounded, outer apex of gonocoxite long and rounded; gap between inner apex narrow; phallus shorter than gonocoxite ( Fig. 16c ).

Female. Body length 9.2 mm, wing length 10.2 mm. Very similar to male, except frons black with thick pale pruinescence, 2.4 x as wide as ocellar tubercle, frons with short golden scales admixed with long black hairs ( Fig. 15l ). Around 20 acanthophorite spines present on each side of tergite 9+10 ( Fig. 16g ).

Remarks. Sisyromyia maculipennis sp. nov. is similar to Sisyromyia limbata , but the male eyes are dichoptic; the frons is short, 1.8 x length of ocellar tubercle; the gap between inner apices of gonocoxites is narrow; and the lateral margin of gonocoxite is strongly curved.

Etymology. The specific name refers to the spotted wing.

Distribution. Australia (WA).

Figures

FIGURE 15. Sisyromyia maculipennis sp. nov. External (a–i (♂); j–o (♀)): (a, j) dorsal; (b, k) lateral; (c) antenna, lateral; (d) wing; (e, l) head, dorsal; (f, m) head, frontal; (g, n) head, profile; (h, o) head, lateral; (i) abdomen, dorsal. Scale bars = 1 mm (a, b, d–o); = 0.1 mm (c).

FIGURE 16. Sisyromyia maculipennis sp. nov. Genitalia (a–e (♂); f, g (♀)): (a) genitalic capsule, dorsal; (b) genitalic capsule, ventral; (c) genitalic capsule, lateral; (d) epandrium, dorsal; (e) epandrium, lateral; (f) sternite 8, ventral; (g) genitalia and spermathecae. Scale bars = 0.1 mm.