556 New Forms of African Lepidoptera 



the third segment of palpus, and the presence of only one dorsal 

 crest placed on first segment of abdomen, indicate differences from 

 Mimeusemia. 



In " Lep. Phal.," vol. iii, p. 609, the form geraldi Kirby is sunk as 

 a synonym of albigutta Karsch, and the description given of Karsch's 

 species is evidently a description of geraldi. The form albigutta has 

 the pectus black, and comes from West Africa ; geraldi may be a race 

 of it, if not another species. 



Lipaeidae. 



26. Nygmia, basipuncta sp. nov. 



$ . Grey-white. Fore wing slightly darker at base and along the costa. 

 A small black subcostal dot near the base, a black discocellular spot. 



Hind wing slightly darker on the outer margin. A black disco- 

 cellular spot larger than on the fore wing. Underside of fore wing 

 with some fuscous scaling along costa and at the apex. 



Antennae greyish-white. Head, palpi, thorax and pectus ochreous- 

 yellow ; abdomen pale-ochreous. 



Length of fore wing : '20 mm. 



Habitat. — Ibima Eiver, Ituri Forest, January, 1920, one $ (type) ; 

 north-eastern outskirts of Ituri Forest, three days south of Irumu, 

 February, 1920, one $ . Taken at light. 



This species is allied to bigutta Holl., but this is without the basal 

 spot on fore wing. 



27. Orgyia nigrocristata sp. nov. 



$ . Upperside of fore wing grey-brown with black and white 

 markings. A black subbasal spot from costa to below cell, with a black 

 angled line from its lower edge to inner margin ; a small black spot 

 below the cell close to the subbasal spot. A black strongly angled 

 discal line, indicated anteriorly by two small subcostal spots, the 

 discocellulars outlined, the line continued more proximal and close to 

 the discal line and not reaching the submedian ; a second postdiscal 

 line, broken below the costa and at vein 6, ending at vein 4 ; a third 

 line placed at about the same distance from the second as this is from 

 the first, strongly crenulate, and nearly parallel to the outer margin 

 to vein 2 when it is bent outwards to the inner margin. A submarginal 

 line, interrupted at the veins. Between the last postdiscal line and 

 the apex are three black costal spots, and an elongate black spot below 



