REVISION OF GENUS ZAMARADA 263 



apices on left side tapered to narrowly rounded tips, single apex on right side finely tapered 

 to acicular tip. Aedeagus with slight, semi-circular projection at one-half. Fulcrum scobinate 

 at apex. 



$ genitalia (PI. 92, figs 826, 827). Ductus bursae enclosed in a short, strongly sclerotized, 

 truncate cone-like sterigma; ventral surface with a semi-circular fold at anterior margin and 

 a short, digitate projection at right side of posterior margin. 



The form of the genitalia of both sexes is diagnostic. 



Measurements. Fore wing: £ $ 15 mm. Antennal pectinations: <$ 5 x , $ 2 x diameter 

 of shaft. 



Distribution. E. Zaire. 



Holotype <$, Zaire ('Belgian Congo'): Middle Lowa Valley, near Walikali, 

 3-4000 ft, forest, ii. 1924, wet season (T. A. Barns), Geometridae genitalia slide 

 no. 7659, in BMNH. 



Paratypes. Zaire ('Belgian Congo'): W. Kivu, Upper Lowa Valley, near 

 Masisi, 5-6000 ft, forest and long grass, ii. 1924 (T. A. Barns), 2 $ (BMNH). 



Zamarada mimesis sp. n. 



(Text-figs 445, 446; PI. 93, figs 828, 829) 



[Zamarada thalia Oberthur, 1912 : 260, 351, pi. 153, fig. 1471, paralectotype; nee fig. 1470, 

 lectotype. Misidentification.] 



(J genitalia (Text-figs 445, 446). Uncus bilobate and asymmetrical. Ventral plate of 

 gnathus strongly sclerotized and minutely scobinate, asymmetrical in form. Valves usually 

 symmetrical, apex of ventral arm bearing long, stiff setae. Aedeagus tapered, dorsal surface 

 minutely scobinate at three-fourths. Coremata bright buff. 



$ genitalia (PI. 93, figs 828, 829). Posterior half of ductus bursae sclerotized, more at right 

 side than left, and enclosed in a smoothly sclerotized, asymmetrical collar, the posterior ventral 

 margin of which is sinuous. 



Measurements. Fore wing: <§ 16-19 mm; 9- 16-0— 16-5 mm. Antennal pectinations: 

 (J 7 X , $ equal in length to diameter of shaft. 



Externally almost identical with paxilla; distinguished in the male by the 

 absence of long, fringing hair-scales from the hind femur and in the female by 

 the very short antennal pectinations. The form of the genitalia of both sexes 

 is diagnostic. 



Distribution. W. Africa, Guinea to Gabon, Zaire. 



Holotype <J, Cameroun ('Kamerun'): Efulen, 23.X.1922 (H. L. Weber), in CM, 

 Pittsburgh). 



Paratypes. Guinea: Gueckedou (/. Koreckd), 1 <$ (MM, Brno); Massadou, 

 near Macenta, 1600 ft, 13-17.V.1926 (C. L. Collenette), 1 $ (BMNH). Sierra 

 Leone: 2 <J, i $ (BMNH), 1 <J (UM, Oxford); Freetown, ii. 1949 (W. Peters), 1 <J 

 (BMNH). Ivory Coast: Lamto, 36 km N.N.W. of Tiassale, 20-23. iv. 1969, 1 <J; 

 Yapo-Sud, 22 km S.S.E. of Agboville, 12-18.iv.1969, 1 $ (both C. Herbulot in coll. 

 Herbulot, Paris). Ghana: Sekondi, 1 $ (BMNH). Nigeria: (/. Boormari), 1 <J; 

 Lagos, 1 $ (both BMNH) ; Moor Plantation, 4 miles W. of Ibadan, c. 530 ft, 



