THYRIDIDAE OF AFRICA AND ITS ISLANDS 83 



wing black and brown, with darker, somewhat obscure, reticulations. Veins Sc+R x and Rs 

 anastomose shortly. Underside dark brown. 



Genitalia <J (PI. 33, fig. 178). Uncus hairy. Gnathus hooked, with very long arms. Sub- 

 scaphium hairy. Valve reduced with strong scale tuft present. Juxta two spiny lateral lobes. 

 Aedeagus with spiny manica and no cornuti. 



?. Unknown. 



Discussion. This species shows some similarities to jacanda. It can be dis- 

 tinguished by the much darker hind wings and the shape of the uncus and other 

 features of the male genitalia. Although only one specimen of this species is known 

 it is sufficiently distinct from S. jacanda to warrant description. 



Distribution. Map 36. Cameroon. 



Material examined. 



Holotype $, Cameroon: Lolodorf {Good), i.ii.1915, Carnegie Mus. ace. 5737, 

 BM slide no. 10303, in CMP. 



Striglina nigranalis (Warren) comb. n. 



(PI. 2, G; PI. 30, fig. 161; PL 55. figs 321, 322) 



Heteroschista nigranalis Warren, 1903 : 271. 

 Mathoris lenistrialis Hampson, 1906 : 114. 

 Mathoris monotonicata Strand, 1913 : 60, syn. n. 

 Heteroschista nigranalis Warren; Whalley, 1964a : 120. 



tj. Wing, 9-13 mm. Vertex dark brown, irons brown with a few raised scales. Antennae 

 minutely ciliate. Labial palps two and a half times diameter of eye, third segment 1/3 length 

 of second. Eyes with long interfacetal hairs. Thorax reddish brown. Hind leg with long 

 scale tuft on tibia and femur. Outer spur of distal pair on hind tibia slightly shorter than inner 

 spur. Tarsi with several spines on each segment, last tarsal segment with a large group of long 

 spines. Middle two tarsal segments of hind leg short, less than 1/3 length of last hind tarsal 

 segment. Fore wing pattern as in PI. 2, G, reddish brown with faint reticulate pattern. 

 Underside paler, reticulate pattern more distinct. Veins R 2 and R 3 with common stem. 

 Hind wings, colour and pattern as fore wing. Sc+R t joins Rs for part of its length. 



Genitalia 3 (PI. 30, fig. 161). Uncus reduced to two short, pointed lobes. Gnathus with 

 two prominent foreward arms and small posterior projection, covered with long hair-like scales. 

 Valve highly modified with long sacculus process. Juxta reduced to membranous plate with 

 two thorn-like basal processes. Aedeagus with group of long sclerotized cornuti. VHIth 

 abdominal sternite lightly sclerotized. 



$. Wing, 12-14 mm. Colour and pattern as male. Labial palps with third segment nearly 

 1/2 length of second segment. Scale tufts on hind legs shorter than in male. 



Genitalia $ (PI. 55, figs 321, 322). Bursa simple; strongly sclerotized and spiny extension 

 of VIHth sternite round ostium. 



Discussion. There is a certain amount of variation in the colour of this species. 

 Some specimens tend to be rather blackish but the majority are a deep reddish 

 brown. This rufous colouration makes the species easily distinguished from other 

 African Thyridids and the genitalia are very characteristic. There is some variation 

 in the shape of the gnathus of specimens from Nigeria and Sierra Leone which may 

 indicate subspeciation. The peculiar structure of the male and female genitalia, 

 together with the hairy eyes, suggest some affinities with guttistigma Hampson. 

 The presence of the lateral process on the valve is unusual but is comparable with 

 some of the other modifications found in the genus. It is possible that S. nigranalis 



