Euscelidia bicolor Janssens, 1954

Dikow, Torsten, 2003, Revision of the genus Euscelidia Westwood, 1850 (Diptera: Asilidae: Leptogastrinae), African Invertebrates 44 (2), pp. 1-131 : 24-25

Euscelidia bicolor Janssens, 1954

Figs 15 , 16

Euscelidia bicolor Janssens, 1954 a: 123 ; Oldroyd 1980: 356.

Diagnosis: The species is distinguished from congeners by the predominantly brown pruinose sct, 2 lateral apruinose spots on the sct, and many setae arranged on pruinose surface on sct (not always present).

Redescription: Head: Black; fc silver pruinose, sometimes yellow pruinose, fc gib indistinct, mystax white, many macrosetae; oc tr white pruinose dorsally (sometimes apruinose); occ silver pruinose, white and yellow setae; Antennae - scp and ped brown, setae brown; pped brown, white pruinose; apsel hyaline; Thorax: Black; sct yellow pruinose medially, margins silver pruinose, 2 lateral spots, not reaching anterior and posterior margins, apruinose, sometimes long brown setae scattered on pruinose part; sctl white pruinose, ds sctl s and sctl s short or long, yellow; Legs - yellow to brown; pro and meso fem in proximal half yellow, distal half brown, meta fem in proximal half pale yellow, clubbed, club brown; pro and meso tib brown, pale yellow stripe anteriorly, meta tib yellow proximally, remaining part brown, pale yellow stripe not reaching tip anteriorly; emp minute; Wings - hyaline, few microtrichia scattered on remigium and distal margin; ptero distinct, brown; cell d terminating in 2 veins; hlt light brown; Abdomen: Brown; T predominantly brown pruinose, grey pruinose laterally, T1 with long white setae laterally, T 2 in proximal half with few white setae laterally, remaining T with white and yellow setae, S grey pruinose; ơ terminalia Fig. 15 - sur pointed distally, lobe ventrally; hypd bent upwards, divided into 2 lobes, sclerite situated just anterior to these lobes; d aed shea short, blunt; lat apod simple.

Type material - The ơ holotype is labelled ‘ HOLOTYPUS (red label with black submarginal border) / TYPE (red label with black submarginal border) / Congo belge: P. N. U. [Parc National de l’Upemba] Lusinga (1.760 m.) 25-III-1947 Mis. G. F. de Witte. 50a / E. Janssens det., 1952 Euscelidia bicolor Em. Janss. [Emile Janssens] (handwritten except for ‘ E. Janssens det., 19’)’. The specimen is double mounted (minuten in block of foam), is in very poor condition (left pped, left legs, right pro tarsus, right meso tib and tarsus broken; abdomen attached to foam block), and is deposited in the MRAC .

Five paratypes (3^^ and 2 of undeterminable gender) are from DR Congo, Upemba National Park , Lusinga (4) or Kamitangulu (1), with the following collection dates 12.iii.1947, 12–18.iii.1947, 15.iii.1947, 2.iv.1947, 16.iv.1947. The specimens are double mounted (minuten in block of foam), are in good to poor condition, and are deposited in the ISNB .

A B C

D E

Type locality and distribution ( Fig. 16 ): DR Congo, Upemba National Park , Lusinga, 8 55'S 27 11' E . Angola, DR Congo, Malawi, Namibia, Zimbabwe .

Material examined: ANGOLA: 2^^ 1? Sa da Bandeira , 14 00'S 15 10'E, 27– 29.iii.1972 ; 1^ 2ơơ Negola , 14 07'S 14 29'E, 25.iii.1972 ; MALAWI: 2^^ 1? Mponela , 1333DA, 26.ii., 7.iii.1987 ; 1^ Ntchisi Forest Reserve , 1333BD, 24– 25.ii.1987 ; NAMIBIA: 1? Hochfeld , 21 29'S 17 50'E, 18.iii.1984 ; ZIMBABWE: 1? Fungwi Nature Reserve , 16 50'S 32 20'E, vii.1928 ; 1^ 1ơ Harare, 17 49'S 31 02'E, 21.ii.1943 ; 1^ Umtali , 18 57'S 32 39'E, 8.iii.1964 ; 1ơ no locality data. Depository: BMNH; NMSA

Remarks: The species shows variation in the number of long setae on the sct. Sometimes no such long setae are present, but the type specimens have many long setae scattered on the sct.

Figures

Fig. 15. ơ terminalia of Euscelidia bicolor. A. Dorsal. B. Ventral. C. Lateral. D. Hypandrium posterior. E. Aedeagus lateral. Scale line = 1 mm.

Fig. 16. Distribution. Euscelidia anthrax, triangles; E. bequaerti, circles; E. bicolor, squares; E. bishariensis, stars; E. discors, pentagon; E. fastigium, hexagon.