THYRIDIDAE OF AFRICA AND ITS ISLANDS 147 



i $, Transvaal (Cook), xi.1908; 2 g, Natal, Sarnia, i.1912 (Janse), in TMP; 1 (J, 

 Sarnia, xi.1913 (Curry), in TMP; Mauritius: i <J, ii.1922 (Leigh). 



NAKAWA gen. n. 



Type-species, Rhodoneura fuscibasis Hampson. 



The two species in this genus have white coloured wings. Nakawa is allied to 

 Nemea Whalley, from which it can be separated by the straight margin of the fore 

 wing, usually sinuous in Nemea, and the prominent juxta lobes. The male of N. 

 fulvipicta is unknown and the placing of this species in Nakawa is only tentative. The 

 genus is only known from Africa. 



Generic description. Proboscis present. Antennae minutely ciliate. Labial palps 

 3-segmented, long, i-i£x diameter of eye. Eyes without interfacetal hairs. Fore tibia with 

 epiphysis. Two pairs of spurs on hind tibia. Tarsi without spines. Radial veins from cell. 

 Gnathus of male genitalia a sclerotized loop. Juxta with long lateral lobes. Female with 

 many minute spines on neck and duct of bursa. 



Biology. No information. 



Key to the African Species of NAKAWA 



1 Wing over 12-5 mm. Apex of fore wing with two black spots, broad, grey, median 



fascia, incomplete anteriad ....... fuscibasis (p. 147) 



- Wing under 12-5 mm. Apex of fore wing without black spots, usually with small, 



white, angled line. Median fascia indistinct .... fulvipicta (p. 148) 



Nakawa fuscibasis (Hampson) comb. n. 

 (PI. 2, A; PI. 42, fig. 234; PI. 63, fig. 399) 



Rhodoneura fuscibasis Hampson, 1910 : 489. 

 Rhodoneura fuscibasis Hampson; Dalle Torre, 1914 : 23. 

 Rhodoneura fuscibasis Hampson; Gaede, 1917 : 365. 

 Rhodoneura fuscibasis Hampson; Gaede, 1929 : 493. 



q\ Wing, 12-5-15 mm. Vertex brown, frons rounded. Labial palps protruding in front 

 of head, third segment 1/2 length of second. Labial palps i|x diameter of eye. Thorax 

 brown. Hind tibia with outer spur of distal pair 1/2 length of inner. Fore wing, pattern as 

 in PI. 2, A, white with grey median area and costal margin and brown basal area. Small brown 

 spot below apex of wing, black dots between veins subapically. Underside similar, rather 

 more yellow-brown colour. iA and 2 A join to form one vein to wing margin. Hind wing, 

 whiter than fore wing, two pale, median, grey fascia, a subterminal yellow mark with one or 

 two black spots subapically. Underside, as upperside. 



Genitalia <$ (PI. 42, fig. 234). Uncus simple, hairy. Gnathus weakly developed. Valves 

 simple, hairy. Juxta, two lobes. Vesica of aedeagus with many short, strongly sclerotized 

 spines. 



$. Wing, 15-19 mm. Colour and pattern as male. Labial palps with third segment almost 

 equal to second. Labial palps projecting well in front of head, 2 x diameter of eye. 



Genitalia $ (PI. 63, fig. 399). Anal papillae short. Part of neck of duct covered with small 

 sclerotized plates. Bursa covered with minute spines, no signum. 



Discussion. The pale colour with a yellow-ochre tinge to the marks of the 

 fore wing make this an easily recognized species. It is much paler than R. sordidula 



