Lasiocnemus hyalipennis Janssens, 1952

Dikow, Torsten, 2007, Taxonomic revision of the genus Lasiocnemus (Loew, 1851) (Diptera: Asilidae: Leptogastrinae), African Entomology 15 (1), pp. 57-74 : 68-69

Lasiocnemus hyalipennis Janssens, 1952 ,

Figs 3, 4 , 14 , 20 , 24

Lasiocnemus hyalipennis Janssens, 1952: 5 , 6;

Hull 1962: 309; Oldroyd 1980: 357.

Diagnosis

The species is distinguished from congeners by the predominantly hyaline wings (only darkened medially), the yellow longitudinal stripe on the prothoracic tibiae, the few microtrichia in the discal cell, and the white and black setae on the metathoracic femora and tibiae (white setae proximally and distally, black setae medially).

Description

Head. Black; face silver pruinose, facial swelling indistinct, mystax white, many macrosetae; proboscis and palpi black, setae black; occiput grey pruinose, setae white. Antennae, scape brown, brown setae dorsally and ventrally, apruinose; pedicel brown, brown setae dorsally and ventrally, grey pruinose; postpedicel brown, grey pruinose; stylus brown, stylus shorter than postpedicel; apical ‘seta-like’ sensory element brown.

Thorax. Orange to brown, grey pruinose, anepisternum and katepisternum setae white; scutum black, orange to brown anterolaterally and medially, predominantly apruinose, margins grey pruinose, surface covered with white setae, white setae on pruinose part; macrosetae: white, one notopleural seta, one supra-alar seta; scutellum grey pruinose, discal scutellar and scutellar setae long, white. Legs, brown; coxa grey pruinose; prothoracic and mesothoracic femora with erect predominantly white setae anteriorly and black setae dorsally, metathoracic femora with erect white setae proximally and distally and brown setae medially, setae on all surfaces, clubbed and widest sub-distally; tibiae with erect white setae on all surfaces, prothoracic tibiae with white cleaning setae in distal half ventrally, metathoracic tibiae with white setae proximally and distally and brown setae medially, prothoracic and mesothoracic tibiae with yellow stripe dorsally; tarsomeres with white setae and black macrosetae, first metathoracic tarsomere with yellow setae posteroventrally; empodium about half length of claw. Wings, length = 8.3–11.4 mm; cell d with only few microtrichia, wing predominantly hyaline, only lightly stained, wing pattern Fig. 14 ; haltere brown.

Abdomen. Brown; T2–4 light brown pruinose dorsally and grey pruinose laterally, T5–6 brown pruinose, T7–8 grey pruinose, T 2 in proximal half with long white setae laterally, remaining T predominantly with short white setae, S2 apruinose medially remaining part grey pruinose, S3–8 predominantly grey apruinose. Male terminalia as in Fig. 3 . Female terminalia as in Fig. 20 .

Type material. The male holotype is labelled ‘ MUSÉE DU CONGO Kapiri IX-1912 Miss. Agric/ Lasiocnemus pilipes Curran Det. S.W. Bromley 19 (species name and author handwritten)/R. Det. 5409 i (‘i’ handwritten)/E. Janssens det., 1951 Lasiocnemus hyalipennis E. Janssens (handwritten except ‘E. Janssens det., 19’)/2 (handwritten)’. The specimen is directly mounted and in good condition (right wing broken, male terminalia attached to specimens pin in genitalia vials), ( MRAC).

Additional material examined. DRC: 1♂ Kapiri, 10°18’S 026°10’E, –. ix.1912 (holotype); SOUTH AFRICA: 3♂ Louis Trichardt, 13 km N, 22°56’S 029°54’E, 27.xii.1990; 1♂ D’Nyala Nature Reserve, 23°27’S 27°29’E, 8–12.xii.1989; 1♀ Mogol Nature Reserve, 23°35’S 27°27’E, 19–23.xi.1979; ZIMBABWE: 1♂ Matopos, 20°25’S 28°29’E, 4.xii.1911; 1♀ Matopos, 6.xii.1990; 1♀ Vumba, 19°53’S 31°22’E, 14.xii.1965. Depositories: BMNH, FSCA, MRAC, NMSA, SANC.

Type locality, distribution and biodiversity hotspot ( Fig. 24 ): DRC, Kapiri, 10°18’S 26°10’E. DRC, South Africa, Zimbabwe. Does not occur in any biodiversity hotspot.

Figures

Fig. 24. Map of sub-Saharan Africa with biodiversity hotspots, shaded in grey, showing distribution of Lasiocnemus fascipennis (●), La. hyalipennis (■), La. londti (▲), and the unidentified female specimen deposited in the SAMC (★). Type localities with open symbols.

Figs 1 – 4. Male terminalia of species of Lasiocnemus in lateral view. 1, La. fascipennis; 2, La. hermanni; 3, La. hyalipennis; 4, La. obscuripennis. Scale bar = 1.0 mm.

Figs 11 – 16. Wings of species of Lasiocnemus. 11, La. fascipennis; 12, La. griseicinctipes; 13, La. hermanni; 14, La. hyalipennis; 15, La. londti; 16, La. lugens. Scale bars = 4.0 mm.

Figs 17 – 22. Female spermathecae of species of Lasiocnemus in lateral view. 17, La. fascipennis; 18, La. griseicinctipes; 19, La. hermanni; 20, La. hyalipennis; 21, La. londti; 22, La. lugens. Note: second lateral spermathecal duct and reservoir, in lateral view situated ventral to median reservoir, omitted. Scale bars = 1.0 mm.