THYRIDIDAE OF AFRICA AND ITS ISLANDS 39 



<J. Wing, 16-19 mm. Vertex brown, irrorate with white scales. Frons brown, flattened 

 between eyes, clypeus slightly bulbous. Antennae strongly bipectinate with long, narrow 

 pectinations. Proboscis reduced. Labial palps with third segment \ length of second segment. 

 Patagia brown. Thorax light brown, irrorate with white. Hind tibia with 2 pairs of spurs, 

 outer spur of distal pair slightly shorter than inner, proximal pair usually well covered with 

 scales (not visible until descaled). Abdomen brown, with white scales along posterior edge of 

 tergites. Fore wing, pattern as in PI. 3, fig. 3, white, heavily reticulated with brown. Promi- 

 nent black discal spot, variable in outline, sometimes with light coloured centre, sometimes 

 Y-shaped. Veins i? 4 and i? 5 anastomosing. Underside colour and pattern as upper side. 

 Hind wings, colour and pattern as fore wing, black mark at apex of cell variable in size. 



Genitalia $ (PI. 26, fig. 137). Gnathus reduced to two small lateral lobes. Juxta with 

 two lateral lobes and two broad, chitinized, processes at 90° to lateral lobes. Transtilla 

 incomplete. 



$. Wing 21 mm. Colour and pattern as male. Antennae minutely ciliate. Labial palps 

 with third segment slightly more than 1/3 length of second segment. 



Genitalia $ (PI. 49, figs 279, 280). Ostium broad, sclerotized, lightly spined. 



Discussion. There is relatively little variation in pattern or colour in the 

 specimens examined. The light coloured wings of this species make it easy to 

 distinguish from other species of the genus. Unlike the previous species there is 

 strong sexual dimorphism in the shape of the antennae. 



Distribution. Map 3. Democratic Republic of the Congo; Tanzania; Malawi; 

 Zambia. 



Material examined. 



LECTOTYPE $, here designated, Malawi: Kasangazi, near Bandawe, 3000 ft 

 above Lake Nyassa (Prentice), BM slide no. 9602, in BMNH. 



Paralectotype, 1 <$, Malawi, data as lectotype. 



Democratic Republic of the Congo: i £, Elisabeth ville (Seydel), in MRAC; 

 3 cJ, Elisabeth ville (Seydel), in CMP; 1 $, Elisabethville (Seydel); 1 $, Samafwanda; 

 Tanzania: i £, Chunya Distr., Chunya, 2650 ft, 28.xii.1947 (Swynnerton) ; Malawi: 

 1 <$, Livingstonia (Wood), in NMR; Zambia: i <J, Kitwe, xii.1954 (Kruger), in TMP. 



Chrysotypus circumfuscus sp. n. 



(PI. 3, fig. 4; PI. 26, fig. 138; PI. 48, figs 277, 278) 



(J. Wing 18-20 mm. Vertex dark brown with a few white scales, frons brown, clypeus 

 not swollen. Antennae strongly pectinate. Labial palps with third segment 1/3 length of 

 second, upturned, not reaching vertex. Proboscis reduced. Patagium brown, irrorate with 

 white scales. Thorax brown with a few white scales. Abdomen brown, white scales laterally 

 on tergum, white on sternum. Hind tibia with one pair of spurs distally, outer spur slightly 

 shorter than inner spur. Fore wing, pattern as in PI. 3, fig. 4, dark brown with darker brown 

 markings, margins of wing brown, very dark brown, almost black, discal spot. Veins R 3 and 

 i? 4 with common stalk. Hind wing, colour and pattern as fore wing. Vein Sc + Ri and Rs free. 



Genitalia <J (PI. 26, fig. 138). Gnathus reduced to two small lateral lobes. Lateral arms of 

 juxta 2/3 width of valve. 



$. Wing, 24-27-5 mm. Colour and pattern as male. Antennae bipectinate, pectinations 

 shorter than male. Labial palps as in male. 



Genitalia $ (PI. 48, figs 277, 278). Duct of bursa with broad neck. 



Discussion. This species is part of the closely allied species-complex containing 



