Euscelidia hyalina, Dikow, 2003

Dikow, Torsten, 2003, Revision of the genus Euscelidia Westwood, 1850 (Diptera: Asilidae: Leptogastrinae), African Invertebrates 44 (2), pp. 1-131 : 69-70

Euscelidia hyalina sp. n.

Figs 39 , 50

Etymology: Latin adjective hyalinus = transparent; refers to the hyaline wings.

Diagnosis: The species is distinguished from congeners by the predominantly apruinose sct, the apruinose T 8 in the ^^, the brown coloration of the whole insect, and features of the ơ terminalia (sur with dorsal and ventral lobe, hypd bent upwards and divided into two lobes, d aed shea short, blunt).

Description: Head: Black; fc silver pruinose, fc gib indistinct, mystax white, 6–7 macrosetae; prob and plp brownish-black, white setae; oc tr silver pruinose dorsally; occ silver pruinose, white and yellowish setae; Antennae - scp brown, brown setae ventrally; ped brown, brown setae ventrally and dorsally, white pruinose; pped brown, white pruinose; apsel brown.

Thorax: Brown; ppro peg large, silver pruinose; sct brown, 3 dark brown longitudinal stripes, median stripe divided at anterior margin, lateral stripes originating medially (stripes fused distad in ơ holotype), apruinose, margins silver pruinose, white setae on pruinose area, some white setae scattered on surface; macrosetae: 1 white or black npl s, 1 black spal s; sctl silver pruinose, ds sctl s and sctl s long, brown; Legs - yellow to brown; pro and meso fem light brown, meta fem pale yellow proximally, clubbed, club brown, setae white; tib brown, pale yellow stripe not reaching tip on meta tib anteriorly; first tar proximally pale yellow, brown distad, remaining tar light brown with brown tip, black setae; emp minute; Wings - hyaline, very few microtrichia on remigium; ptero distinct, brown; cell d terminating in 3 veins; hlt light brown.

Abdomen: Brown; T1 grey pruinose, T 2–5 in proximal half apruinose, distal half brown pruinose, margins grey pruinose, remaining T brown pruinose, anterior and posterior margins grey pruinose, T 8 in ^ apruinose, T1 with long brown setae laterally, T 2 in proximal half with white setae laterally, remaining T with white setae, S2 apruinose, remaining S grey pruinose; ơ terminalia Fig. 39 - sur pointed distally, lobe dorsally and ventrally; hypd bent upwards, divided into 2 lobes; d aed shea short, blunt; lat apod simple.

Type material - The ơ holotype and ^ paratype are labelled ‘ 7 II 1966 [7.ii.1966] OULI BANGALA Logone , Tchad 195 Coll. J.C. Hitchcock, Jr. (‘7 II’ and ‘195’ handwritten) / IN COPULA (handwritten) / HOLOTYPE ơ; PARATYPE ^ Euscelidia hyalina sp. nov. det. T. Dikow 2001 (red label)’. The specimens are double mounted (minuten in block of cork, ơ specimen above ^), are in good condition (ơ left meta leg and left wing broken, abdomen broken (attached to block of cork), ơ terminalia attached to specimens pin in micro vial; ^ right pped broken), and are deposited in the USNM .

Type locality and distribution ( Fig. 50 ): Chad , Ouli Bangala, 749'N 15 49'E. Chad .

A B C

Figures

Fig. 39. ơ terminalia of Euscelidia hyalina sp. n. A. Dorsal. B. Ventral. C. Lateral. D. Hypandrium posterior. E. Aedeagus lateral. Scale line = 1 mm.

Fig. 50. Distribution. Euscelidia castanea, circles; E. hyalina sp. n., triangle; E. nenemusha, star; E. obudu sp. n., pentagon; E. schoutedeni, squares.