Euscelidia atrata, Dikow, 2003

Dikow, Torsten, 2003, Revision of the genus Euscelidia Westwood, 1850 (Diptera: Asilidae: Leptogastrinae), African Invertebrates 44 (2), pp. 1-131 : 27-30

Euscelidia atrata sp. n. ( E. brunnea species-group)

Figs 20A–E , 59

Etymology: Latin adjective atratus = dressed in black; refers to the dark wings and legs.

Diagnosis: The species is distinguished from congeners by the predominantly apruinose sct, dark brown coloured wings, predominantly dark brown legs, and features of the ơ terminalia (d aed shea open extending gonp).

Description: Head: Black; fc yellow pruinose, fc gib indistinct, mystax white, many macrosetae; prob and plp brownish-black, setae white; oc tr white pruinose dorsally; occ silver pruinose, with apruinose parts, setae white; Antennae (pped broken) - scp brown, brown setae ventrally, white pruinose; ped brown, brown setae ventrally and dorsally, white pruinose.

Thorax: Black; ppro peg small, distinct, silver pruinose; sct predominantly apruinose, anterior, lateral, and posterior margins grey pruinose, long brown setae on anterior and lateral margins; macrosetae: black, 1 npl s, 1 spal s; sctl silver pruinose, ds sctl s and sctl s long, brown; Legs - yellow and dark brown; pro and meso fem yellow proximally, remaining part dark brown, meta fem in proximal half yellow, distal half dark brown, slightly clubbed; pro and meso tib brown, pale yellow stripe not reaching tip anteriorly, meta tib pale yellow proximally, remaining part dark brown, pale yellow stripe anteriorly in proximal half; all tar on pro and meso leg brown, first tar on meta leg yellow, remaining tar brown, setae black; emp minute; Wings - densely covered with microtrichia and

A B C

D E F G

H I K

A - E F - K

dark brown coloured; ptero not distinguishable; cell d terminating in 2 veins; hlt light brown.

Abdomen: Black; T brown pruinose medially and grey pruinose on anterior and posterior margins, T1 with long brown setae laterally, T 2 in proximal half with white setae laterally, remaining T with short white and yellow setae, S grey pruinose; ơ terminalia Figs 20A–E - sur pointed distally, lobe ventrally; hypd bent upwards, divided into 2 short lobes, sclerite situated posteriorly to gonst; d aed shea open, extending gonp, lat pr aed short; lat apod simple.

Type material - The ơ holotype is labelled ‘ Congo Belge, P. N.G. [Garamba National Park] Miss. H. De Saeger Mt Moyo, 29-vii-52 [29.vii.1952] H. De Saeger. 3844 / Euscelidia bicolor J. det. H. Oldroyd 1966 (handwritten except for ‘det. H. Oldroyd 19’) / HOLOTYPE Euscelidia atrata sp. nov. det. T. Dikow 2001 (red label)’. The specimen is double mounted (minuten in block of foam), is in good condition (pped and left meso leg broken, wings damaged; ơ terminalia attached to specimens pin in micro vial), and is deposited in the BMNH.

Type locality and distribution ( Fig. 59 ): DR Congo , Garamba National Park , Mount Moyo, 406'N 29 27'E (co-ordinates for Garamba National Park). DR Congo .

Figures

Fig. 20. ơ terminalia. A–E. Euscelidia atrata sp. n. A. Dorsal. B. Ventral. C. Lateral. D. Hypandrium posterior. E. Aedeagus lateral. F–K. E. notialis sp. n. F. Hypandrium posterior. G. Aedeagus lateral. H. Dorsal. I. Ventral. K. Lateral. Scale lines = 1 mm.

Fig. 59. Distribution. Euscelidia adusta sp. n., triangle; E. atrata sp. n., star; E. picta sp. n., hexagon; E. pulchra sp. n., circles.