Ischiolobos niveoscutum (Hull, 1967) Londt, 2005

Londt, Jason G. H., 2005, A review of afrotropical Afroholopogon Londt, 1994 with the description of a new genus and new species (Diptera: Asilidae: Stenopogoninae), African Invertebrates 46 (1937), pp. 203-252 : 235-236

publication ID	https://doi.org/ 10.5281/zenodo.7666864
persistent identifier	https://treatment.plazi.org/id/CF1787E3-FFED-FFFC-EB18-FD55FD27E2AF
treatment provided by	Felipe
scientific name	Ischiolobos niveoscutum (Hull, 1967)
status	comb. nov.

Treatment

Ischiolobos niveoscutum (Hull, 1967) , comb. n.

Figs 71–73 View Figs 65–76 , 80 View Fig

Holopogon niveoscutum Hull, 1967: 239 View in CoL ; Oldroyd 1980: 362 (catalogue). Type locality: Lesotho.

Afroholopogon niveoscutum: Londt 1994: 64 .

Redescription: Based on holotype.

Head: Antenna: Dark red-brown, fine red-gold pruinose, mainly black setose (some pale setae on scape); segmental formula 1.0:1.1:4.3:0.1:1.3 (basal segment of style difficult to discern). Face dark red-brown, entirely silver pruinose, mystax black, limited to lower third of face. Face width:head width ratio 1.0:4.0. Frons and vertex dark redbrown, laterally silver pruinose (ocellar tubercle apruinose), long dark red-brown setose (a few pale yellow setae laterally). Occiput dark red-brown, silver pruinose, white setose (few dark red-brown dorsally). Proboscis red-brown, white setose. Palpi brown, pale yellow-brown setose.

Thorax: Mesonotum dark red-brown, silver pruinose except for large apruinose areas. Setation: ac – fine long dark red-brown; dc – fine long dark red-brown; npl – 2 moderate black; sa – 1 long thin black and smaller setae; pa – fine long dark red-brown. Scutellum dark red-brown, entirely silver gold pruinose, disc asetose, margin with 4 long thin black macrosetae and a few tiny setae. Pleura brown, entirely silver pruinose, major setae black. Wing 3.7 x 1.7 mm, membrane brown, microtrichia brown, covering entire membrane, basal angle of r 4 21°. Halter pale brown with white knob. Legs: cx dark brown, silver pruinose, white setose; trochanters dark brown; fem dark brown fine long dark red-brown and yellow setose; tib and tar similar to fem.

Abdomen: Terga orange-brown, shiny apruinose except for silver pruinose anterior parts of T1–4 , dark red-brown setose. Sternal colour as tergal but slightly paler, apruinose except for small anteromedial silver pruinose spots, setae long fine yellow-brown. Genitalia of holotype not macerated but appearing to conform closely with the illustrated Rhodes ơ ( Figs 71–73 View Figs 65–76 ): Hypopygium rotated through about 180°; epand (in dorsal view) deeply incised to form broadly-rounded lobes that project well beyond level attained by hypd; goncx externally distally unilobed and projecting (in lateral view) slightly beyond level attained by epand; hypd (in lateral view) short, rapidly tapering to slightly distally bilobed medial process .

Variation : Sexes similar. Specimens from 10 km E Rhodes agree well with the holotype except that they are slightly larger (female wing-length 5.2 mm, male wings tattered and not measured), black (note that the holotype may be somewhat teneral), and with less extensive mesonotal pruinescence .

Type specimen (seen): LESOTHO: ơ holotype (seen) ‘ Mamalapi Mtn [2916S 2803E] / Basutoland / 27-xii- 1948 / C. Jacot-/ Guillarmod’ ( MZLU) .

Other material studied: SOUTH AFRICA: 1ơ 1^, ‘ South Africa : Cape. / 10 km E Rhodes 3028 CC / Bottom Naudésnek Pass / J. Londt + B. Stuckenberg / 9.i.1979 River banks’ .

Distribution (Table 1), phenology (Table 2) and biology: Known from two localities at high altitudes in and near Lesotho ( Fig. 80 View Fig ). The species flies from December to January. The Rhodes material was swept from tall grass along the banks of a stream.

Similar species: I. notios (see discussion).