Oratostylum zebra, Torsten Dikow & Jason G. H. Londt, 2000

Torsten Dikow & Jason G. H. Londt, 2000, A review of the genera Anasillomos Londt, 1983, Oratostylum Ricardo, 1925, and Remotomyia Londt, 1983, with description of a new genus and two new species (Diptera: Asilidae: Stenopogoninae), Ann. Natal Mus. 41, pp. 107-121 : 115

Oratostylum zebra sp. n.

(Figs 11-13, 16, 19)

Etymology: Zebra refers to the type locality, the Mountain Zebra National Park, South Africa.

Description (based on all material examined):

Head: Antenna orange-brown; postpedicel cylindrical (Fig. 16), longer than scape and pedicel combined; scape orange with anteriorly directed yellow setae; pedicel darker and with only fine setae; face orange-brown with dense silvery pruinescence, mystax yellow with some white setae on lateral lower margin, facial swelling pronounced, ending abruptly in upper part; vertex black, silver pruinose, with yellow setae laterally; ocellarium prominent with 10-13 yellow setae; occiput black with silvery pruinescence, yellow and white setae; proboscis black, stout, ventrally with white setae; palpi black and very long, about three quarters of length of proboscis, white setae ventrally.

Thorax: Orange-brown; pronotal and propleural setae white; postpronotal lobe orange-brown with silver pruinescence and yellowish setae; mesonotum with pattern of silver and brown pruinescence - 3 silver longitudinal stripes not reaching hind margin, 3 brown spots laterally, 2 brown triangular spots in posterior part, mesonotum covered with short brownish setae, dorsocentral setae weakly developed, all macrosetae yellow; scutellum silver pruinose in anterior part and with silver pruinose median longitudinal stripe, disc with white setae, 6-8 yellow apical scutellar setae; mesopleura with white setae only; katagergal setae yellow; anatergal setae yellowish; legs: coxae orange-brown with silver pruinescence and white setae; fore femur orange-brown, anterodorsally black, with only white setae; fore and hind tibiae brown with dense short yellow setae on inner margin which extend onto basitarsi, these setae only on distal half of hind tibia; mid and hind femora orange-brown, black anterodorsally, with yellow macrosetae, hind femur in distal half black; mid tibia orange-brown, hind tibia similar, but anterior part black; tarsi brown; all macrosetae pale yellow; claws proximally orange and distally black, pointed; pulvilli large, yellow; empodium needle-like, black; wing: membrane transparent; veins basally yellow, distally brown; r 5 open, m 3 open; halteres pale yellow. Abdomen: orange-brown; T1 with long white setae, a few pale yellow setae laterally; T2 with white and yellow setae; remaining terga with yellow setae; tergal pruinescence silver-brown in proximal part and silver in distal quarter, only silver triangles laterally on distal terga; sterna silver pruinose with white setae; T7-8 apruinose in ♀, brown with erect fine setae; macrosetae of acanthophorites reddish-brown; ♂ genitalia orange-brown with white and pale yellow setae (Figs 11-13).

Material examined: SOUTH AFRICA: 1♂ holotype, 'STH AFRICA Cape Prov / Mountain Zebra Nat. P. / 24km W. of Cradock / 3225AB 21.i.1984 / D. & C. Barraclough / rocky hillside’ ( NMSA); 3♂ 1♀ paratypes, 'STH AFRICA Cape Prov / Mountain Zebra Nat. P. / 24km W. of Cradock / 3225AB 21.i.1984 / D. & C. Barraclough / rocky hillside’ ( NMSA).