n6 P. E. S. WHALLEY 



in slightly. Valve with prominent median process. Aedeagus without cornuti, vesica spiny. 



$. Wing, 19 mm. Pattern and colour as male. 



Genitalia $ (not figured). Similar to elaphropa, PI. 59, fig. 360, but ostium more sclerotized. 

 Bursa spiny, with two, clearly marked, spiny patches forming signa, one patch one each side of 

 centre of bursa. 



Discussion. Considerable variation in the origin of R 5 in the fore wing of this 

 species was found. In one specimen R 5 was absent on one side and in other speci- 

 mens R 5 was free from R 3 + R 4 . Generally the sub terminal fascia of two lines and 

 the median fascia, made up in the same way, distinguishes this species from the other 

 white African Thyrididae. The genitalia are quite distinct from all the species in 

 other genera. From P. elaphropa it can be distinguished by its larger size and by 

 differences in the male genitalia. The affinities of P. stratifica are not clear, it is 

 intermediate between species like K. gemmata where the development of the uncus 

 is similar and Epaena inops where the venation and pattern are similar. 



Distribution. Map 60. Democratic Republic of the Congo; Tanzania; Malawi. 



Material examined. 



Holotype $, Democratic Republic of the Congo: Elisabethville, 27.iii.1933 

 (Seydel), BM slide no. 9515, in MRAC. 



Democratic Republic of the Congo: i <$, Lumbumbashi, xii (Seydel), in MRAC; 

 1 (J, Elisabethville, Lumbumbashi, xi.1926 (Seydel), in MRAC; 1 $, Elisabethville 

 (Seydel), ii.1933; 1 $, Elisabethville, xii. 1928 (Seydel), in MRAC; 1 <J, Elisabethville, 

 x.1933 (Seydel), in MRAC; 2 $, Elisabethville, iii.1935 (Seydel); 1 <$, Elisabethville, 

 16.iii.1937 (Seydel), in MRAC; Tanzania: 2 <J, Mbinga, Matengo-Hochland, WSW. 

 Songea, 1300-1400 m (Zerney), ii.1936, 1 $ in NHV; Malawi: i $, Mkuwadzi 

 Forest, Nkata Bay, v. 1966, in NMR. 



Pyralidoxa elaphropa (Meyrick) comb. n. 

 (PL 10, fig. 47; PI. 37, fig. 204; PI. 59, figs 360, 361) 

 Hypolamprus elaphropa Meyrick, 1936 : 26. 



o". Wing, 10-5-1 1 mm. Vertex white with brown scales. Frons rounded, white. Labial 

 palps with third segment 1/4 length of second, upturned, not reaching vertex. Thorax and 

 patagia white. Legs white with brown stripes. Hind tibia with outer spur of distal pair 1/2 

 length of inner spur. Fore wing, pattern as in PI. 10, fig. 47, white with grey-brown reticulations. 

 Costal margin grey-brown, prominent ladder-like fasciae in subterminal and median position. 

 Underside similar, Vein i? 5 off common stalk oi R 3 +R i . Hind wing similar, ladder-like fasciae 

 prominent subterminally and medially. Sc+Rj^ and Rs approach but do not join 



Genitalia $ (PI 37, fig. 204). Uncus broadly expanded. Gnathus a sclerotized loop 

 without medial process. Strongly sclerotized median process on valve and toothed basal 

 process. Juxta small, apex of lateral arms Y-shaped. Aedeagus with cornuti, vesica minutely 

 spined. 



?. Wing, ii'5 mm. Labial palps with third segment 1/3 length of second segment, other- 

 wise similar to male. 



Genitalia $ (PI. 59, figs 360, 361). Strongly sclerotized V-shaped plate over ostium. Duct 

 minutely spined. Bursa spined. 



Discussion. This species is similar to P. stratifica and can be distinguished by 



