REVISION OF GENUS ZAMARADA 213 



£ genitalia (Text-figs 351, 352). Apex of uncus tricuspid, rather more strongly developed 

 in the paratype that is illustrated than in the holotype. Ventral plate of gnathus strongly 

 sclerotized, tapered and minutely but densely scobinate. Valve tapered and incurved 

 towards uncus, ventral margin minutely serrate and scobinate. Fulcrum sinuous, scobinate 

 apex extending beyond that of aedeagus. 



°. unknown. 



Measurements. Fore wing: $ 18-19 mm. Antennal pectinations: (J 8x diameter of 

 shaft. 



In the genitalia the tricuspid form of the uncus and the evenly tapered and 

 curved valve with its serrate ventral margin are diagnostic. 



Distribution. Zaire, Cameroun. 



Holotype <$, Zaire ('Belgian Congo'): Upper Congo, Yakusu, v. 1900 (K. Smith), 

 Geometridae genitalia slide no. 7643, in BMNH. 



Paratypes. Zaire ('Belgian Congo'): Sankaru, Katako-Kombe, 10. x. 1952 

 (Dr M. Fontaine), 1 $ (MRAC, Tervuren). Cameroun: Savanes d'Akak, 14 km 

 N.N.E. of Yaounde, 20.ix.1971 (P. Darge), 1 <$; N'Kolbisson, 7 km \V. de Yaounde, 

 700 m, 15-18.iv.1972 (C. Herbnlot), 1 o (both coll. Herbulot, Paris). 



A further male from Kinshasa (Leopoldville), with very short lateral points on 

 the uncus, a less finely tapered ventral plate of the gnathus and a broader, less 

 tapered valve is provisionally associated with tricuspida, but excluded from the 

 type-series. The full data are: Zaire ('Belgian Congo'): Leopoldville, 11. xi. 1953 

 (Dr M. Fontaine), 1 <J (MRAC, Tervuren). 



Zamarada clavigera sp. n. 



(Text-figs 353, 354; PI. 75, figs 752, 755) 



<$ genitalia (Text-rigs 353, 354). Uncus laterally rounded, apex shallowly bilobate, 

 reminiscent of a larval head-capsule. Ventral plate of gnathus broader than uncus, broadly 

 excavate to three-fifths of depth of plate, greatest width of excavation three-fourths width 

 of plate; club-like apices of lateral margins sclerotized and scobinate. Apices of ventral and 

 dorsal margins of valve produced and tapered. 



$ genitalia (PI. 75, figs 752, 755). Sterigma with tapered, lateral projections. 



Measurements. Fore wing: <J 16— 17 mm; $ 15-0-16-5 mm. Antennal pectinations: 

 O* 10 x , $ 4 X diameter of shaft. 



Closely similar in colour and pattern to tricuspida. Distinguished externally 

 in the male by the less dilate hind tibia, which encloses a buff, not grey tuft of 

 long hair-scales. In the male genitalia the form of the uncus and ventral plate 

 of the gnathus and in the female genitalia the form of the sterigma are diagnostic. 



Distribution. Gambia, Cameroun, Gabon. 



Holotype <$, Cameroun ('Fr. Cameroons'): Yabassi Dist., Lat. 4 N., Long. 

 10° E., xii. 1937, dry season (F. G. Merfield), Geometridae genitalia slide no. 7711, 

 in BMNH. 



Paratypes. Gambia (Moloney), 1 <$ (BMNH). Cameroun: Victoria, 1890 

 (Teusz), 1 <J (MNHU, Berlin); holotype data, 1 $; Johann-Albrechts Hohe, 1896 



