146 D. S. FLETCHER 



membranous, setose projection from near base of dorsal process abnormally large. 

 Fulcrum scobinate at apex. Ventral plate of gnathus developed. The male 

 hind tibia is dilate with a hair-pencil. 



Key to Species 



i Valve straight, apical third narrowed to width of apical half of fulcrum ; apex 



spatulate and narrowly rounded; dorsal process with broad-based, setose 

 projection from basal third ... . . . . . lepta (p. 146) 



- Apical third of valve incurved through 90 degrees towards uncus and spatulate 



to rounded apex; dorsal process with along, digitate, setose projection from 

 near base ........... suda (p. 147) 



Zamarada lepta sp. n. 



(Text-figs 246, 247; PI. 51, figs 654, 655; PL no, fig. 987) 



<$ $ (PL no, fig. 987). Hyaline area of wings tinged with yellow and sparsely striate with 

 grey proximally; discal spots black, minute and sharply marked. Non-hyaline terminal 

 area of each wing greyish red (pi. 8, C5) ; dentate subterminal fascia brownish orange, sharply 

 defined; cilia chequered greyish yellow and grey. Underside of non-hyaline terminal area 

 of wings similar to that of dilucida. 



^ genitalia (Text-figs 246, 247). Uncus tapered and curved ventrad. Arms of gnathus 

 slender, ventral plate developed. Valve slender and straight, apical half narrowed to width 

 of apical half of fulcrum, apex spatulate and narrowly rounded; slender dorsal process with 

 a broad-based, setose projection from basal third. Aedeagus tapered to a weakly sclerotized 

 apex; basal two-thirds sclerotized in longitudinal rib-like form. Fulcrum strongly sclerotized, 

 extending beyond tip of aedeagus, the tip spatulate and scobinate. Vesica without a cornutus. 



9 genitalia (PI. 51, figs 654, 655). Lamella antevaginalis rectangular, the outline strongly 

 sclerotized, that of the posterior margin irregular; medial area weakly sclerotized. Corpus 

 bursae very slender, sclerotized posteriorly. 



Measurements. Fore wing: $Q n-13 mm. Antennal pectinations: ^ 16 X,$4 X diameter 

 of shaft. 



Similar in size and pattern to one of the small West African species in the 

 excavata-gxoup, lophobela, and to fibulata, ostracodes and melanopyga in the protrusa- 

 group, but distinguished by the greyish red rather than the greyish brown colour 

 of the non-hyaline terminal area of the wings; the three species from the protrusa- 

 group may be further distinguished in the male by the presence of a simple hind 

 tibia. 



Distinguished externally from the closely similar dilucida by the redder 

 non-hyaline terminal area of the wings, the markedly reduced grey striation of 

 the hyaline area and by the presence of discal spots. 



In the male genitalia the form of the tapered, spatulate valve and in the female 

 genitalia the form of the sterigma and slender corpus bursae are diagnostic. 



Distribution. Sierra Leone, Liberia, Ivory Coast, Ghana, Nigeria, Cameroun, 

 Angola, Uganda. 



Holotype <$, Sierra Leone: Freetown, 8.x-iC;.xi.i968 (D. F. Owen), Geometridae 

 genitalia slide no. 7144, in BMNH. 



