THYRIDIDAE OF AFRICA AND ITS ISLANDS 81 



of Rio Quanza, alt. 3650 ft, Malange Distr., ii.1931 (Boulton), in CMP; 1 $, Ceramba, 

 Bihe, iii.1903 (Bell); Rhodesia: i <$, Mwinilunga, v.1961, in NMR; 1 (J, Mwinilunga, 

 Ikelenge, iv.1963, in NMR. 



The HUMERALIS-Grovp 



This species-group contains four species. It is characterized by the fusion for 

 part of their length of veins Sc + R^^ and Rs in the hind wing. All the species in the 

 group have interfacetal hairs in the eyes. S. nigranalis has several distinct features 

 which may require a separate subgenus for that species but the first three species are 

 very similar. Small ocelli are present in the first three species in this group. 



Striglina humeralis sp. n. 



(PI. 2, M; PI. 31, fig. 172; PI. 54, fig. 320) 



cJ. Wing, i3 , 5-i6 , 5 mm. Vertex reddish brown, frons rounded. Eyes with interfacetal 

 hairs. Ocelli present, small. Antennae ciliate. Labial palps with third segment 1/4 length 

 of second, upturned, not reaching vertex. Thorax reddish brown. Hind tibia flattened with 

 long scales, each spur with strongly sclerotized tip, proximal pair of spurs almost hidden by 

 long scales. Outer spur of distal pair slightly shorter than inner. Hind tarsi each with pair 

 of spines at distal end. Fore wing, pattern as in PI. 2, M, reddish brown with yellowish brown 

 terminal and subterminal areas. Faint reticulation visible in terminal area. Radial veins 

 from cell. Underside as upper side, paler. Hind wing brown with pinkish suffusion. Several 

 darker brown transverse bands. Inner fringe pinkish red. Underside as upper side, paler. 

 Veins Sc+R 1 and Rs fused for part of length. Median vein faintly visible in cell. 



Genitalia <J (PI. 31, fig. 172). Uncus bifid. Gnathus arms long. Subscaphium with 

 spines. Valves very reduced with prominent scale-tufts. Juxta plate-like with two small 

 lateral arms. Aedeagus with two patches of spines. 



$. Wing, i6-i8'5 mm. Wings much darker than male, generally lacking yellow-brown 

 terminal and subterminal areas. Strong reddish suffusion over wing. Antennal ciliations 

 shorter than in male. 



Genitalia $ (PI. 54, fig. 320). Anal papillae short. Genital plate (lamella antevaginalis) 

 highly modified. Transverse signum in bursa. 



Discussion. This species shows some similarities with guttistigma Hampson. 

 It can be distinguished from that species by the wing pattern and in the genitalia 

 by the almost complete reduction of the valve in the male humeralis. In the female 

 the genital plates differ in shape. A specimen of this species was labelled "Striglina 

 humeralis type <$ Warren". No trace of the publication of this name by Warren has 

 been found and it is regarded here as a manuscript name. 



Distribution. Map 35. Cameroon; Democratic Republic of the Congo; 

 Angola; Zambia; Tanzania. 



Material examined. 



Holotype^, Angola: Bihe (Rothschild coll.), BM slide no. 10304, in BMNH. 



Paratypes. Cameroon: i $, Bitje, Ja River, 2000 ft, dry season (Bates), 

 vi-vii.1909; 3 $, Efulen (Weber), ix-xii.1922, two in CMP; Democratic Republic 

 of the Congo : 1 $, Uele, Paulis, 25.viii.1957 (Fontaine), in MRAC ; 1 $, Elisabethville, 

 v.1926 (Seydel), in MRAC; 2 $, Elisabethville, ii-iii.1957 (Seydel), in MNHN; 1 <J, 



