Lasiocnemus

Dikow, Torsten, 2007, Taxonomic revision of the genus Lasiocnemus (Loew, 1851) (Diptera: Asilidae: Leptogastrinae), African Entomology 15 (1), pp. 57-74 : 73

Identification key to Lasiocnemus species

1. Mesonotal pruinosity restricted to lateral and posterior margins (centre of scutum apruinose); metathoracic empodium longer than half length of claw.................. 2

— Scutum entirely grey and brown pruinose; metathoracic empodium shorter than half length of claw.................... La. londti

2. Cell d densely covered with microtrichia... 6

— Cell d with only a few microtrichia........ 3

3. Setae on metathoracic tibiae long and erect on all surfaces; metathoracic tibiae with white setae proximally................... 5

— Setae on metathoracic tibiae only long and erect on ventral surface, dorsally setae only short and not as densely arranged; metathoracic tibiae with black setae proximally (rarely setae white)...................... 4

4. Wing with a pattern of brown staining and white spots ( Fig. 11 ); prothoracic tibiae with yellow stripe dorsally; occiput with white and black setae; metathoracic tibiae with relatively long erect setae dorsally; metathoracic tibiae with white setae ventrally occupying nearly distal half of tibiae

............................ La. fascipennis

— Wing more or less evenly brown coloured ( Fig. 13 ); prothoracic tibiae without yellow stripe dorsally; occiput with black setae only; metathoracic tibiae with very short erect setae dorsally; metathoracic tibiae with white setae ventrally occupying only distal one-quarter of tibiae...... La. hermanni

5. Mystax consists of four black macrosetae; wings brown coloured except for transverse white stripe in distal half ( Fig. 12 ); scutum metallic bluish-black; empodium less than half length of claw; prothoracic tibiae entirely black..................... La. griseicinctipes

— Mystax consists of ten or more white macrosetae; wings predominantly hyaline, only pterostigma light brown coloured ( Fig. 14 ); scutum brown (sometimes red) anteriorly and black posteriorly; empodium longer than half length of claw; prothoracic tibiae with distinct yellow anterior longitudinal stripe....................... La. hyalipennis

6. Mesonotal and anepisternal setae yellow; face and mystax white; dorsal surface of prothoracic tibiae with white/yellow longitudinal stripe; setae distally on metathoracic tibiae extensively yellow.... La. obscuripennis

— Mesonotal setae white or brown and anepisternal setae brown to black; face brown pruinose; mystax black; dorsal surface of prothoracic tibiae without any pale stripe; setae on metathoracic tibiae predominantly black except distal tip which is yellow anteriorly....................... La. lugens

Figures

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.