REVISION OF GENUS ZAMARADA 265 



MBG, Paris). Zaire ('Belgian Congo'): Kasai, xii. 1923, 1 <$ (BMNH); Prov. 

 Orientale, Opala, Lomami River, iii. 1959 (R. H. Carcasson), 1 <J (NMK, Nairobi); 

 Itoko a Gombe (L. Verlaine), 1 <$ (MRAC, Tervuren); Ukakuraka, 20. xii. 1948 

 {T. Wikeley), 1 <J (BMNH); Kibali-Ituri, Nioka, 16.vii.1952 {J. Hecq), 1 J (MRAC, 

 Tervuren). Uganda: holotype data, 1 $ (NMK, Nairobi), 2 $ (BMNH). 



Zamarada opala Carcasson 

 (Text-figs 449, 450; PI. 79, figs 771, 772; PI. 123, fig. 1097) 



Zamarada opala Carcasson, 1964 : 54, pi. 1, figs 4, 5; pi. 7, figs 57, 58. Holotype $, Zaire 

 (BMNH) [examined]. 



<J $ (PI. 123, fig. 1097). Hyaline area of wings tinged with yellow and finely edged with 

 brown both proximally and distally. Non-hyaline areas a pale brownish orange (pi. 6, C3) 

 irrorate with brownish orange (pi. 6, C6, caramel-brown) as shewn in figure; dentate subterminal 

 fascia greyish orange: cilia chequered buff and brown. Underside of non-hyaline terminal 

 area brown (pi. 6, E5), greyish brown terminad. 



The male hind tibia is dilate with a short-scaled, longitudinal pocket, three-fourths as long 

 as the tibia. 



(J genitalia (Text-figs 449, 450). Uncus bilobate and symmetrical. Ventral plate of 

 gnathus strongly sclerotized and deep, apex narrowly rounded and scobinate. Valves 

 asymmetrical. Aedeagus tapered, with a short, broadly rounded projection at one-half. 

 Fulcrum reduced and slender, one-half as long as aedeagus and scobinate at apex. 



$ genitalia (PI. 79, figs 771, 772). Sterigma forming strongly sclerotized collar round 

 operculum, posterior margin bilobate; ductus bursae sclerotized posteriorly. 



Measurements. Fore wing: g 20-22 mm; 9- 20-0-20-5 mm. Antennal pectinations: 

 O* 7 X, $ 2 X diameter of shaft. 



Distinct in colour and pattern; the genitalia of both sexes are also diagnostic. 

 Associated with the eucharis-group because of the bilobate uncus, strongly 

 developed ventral plate of the gnathus and the asymmetrical valves. 



Distribution. Cameroun, Zaire. 



Material examined. 



Zamarada opala Carcasson, holotype <$, Zaire ('Belgian Congo'): Prov. Orientale, 

 Lomami River, Opala, iii. 1959 (R. H. Carcasson), Geometridae genitalia slide 

 no. 5634, in BMNH. 



Cameroun: Lolodorf (L. Conradt), 1 $ (BMNH); Efulen, n.x.1922 (H. L. Weber), 

 1 $ (CM, Pittsburgh). Zaire ('Belgian Congo'): holotype data, 1 $ {Zamarada 

 opala Carcasson, paratype, in BMNH); Sankaru, Katako-Kombe, 18.ix.1952 

 (Dr M. Fontaine), 1 £ (MRAC, Tervuren). 



The WEBERI-Grovp 



Characterized in the male genitalia by the bilobate uncus, the asymmetrical 

 but simple valves and their reduced, asymmetrical dorsal processes, each dilate 

 and setose at apex, but without a basal projection. 



