204 D. S. FLETCHER 



the posterior margin of the wing; discal spots absent. Non-hyaline terminal area of each 

 wing light brown (pi. 7, D4) tinged with purplish grey; subterminal fascia dentate and black, 

 finely edged distally with sparse glossy buff scales, broken between veins. Underside of 

 non-hyaline terminal area uniformly greyish brown. 



Male hind tibia dilate with a dense tuft of dark brown hair-scales, the tuft almost as long 

 as the tibia. 



<§ genitalia (Text-figs 335, 336). Closely similar to those of dilata, differing in the broader 

 dilation of the dorsal process of the valve near its base and its irregular rather than smooth 

 outline. 



$ unknown. 



Measurements. Fore wing: (J 18-19 mm. Antennal pectinations: $ 7 x diameter of shaft. 



Distinguished externally from the closely related dilata by the broader and 

 deeper extension of the clearer hyaline area terminad between veins M z and Cu lb , 

 by the absence of any discal marking, by the colour of the upperside of the non- 

 hyaline terminal area of each wing and by the uniformly greyish brown colour 

 of its underside. Distinguished further by the markedly less dilate hind tibia in 

 the male and its longer, darker hair tuft. 



Distribution. Zaire. 



Material examined. 



Zamarada enippe Prout, holotype <$, Zaire ('Belgian Congo'): Congo River, 

 Kinshasa, v. 1920 (T. A. Barns), Geometridae genitalia slide no. 3654, in BMNH. 



Zaire ('Belgian Congo'): nr Walikali, Middle Lowa Valley, 3-4000 ft, ii. 1924, 

 wet season (T. A. Barns), 1 <$; nr Masisi, Upper Lowa Valley, 5-6000 ft, forest and 

 long grass, ii. 1924 (T. A. Barns), 1 <$ (both BMNH). 



Zamarada clenchi sp. n. 



(Text-figs 337, 338; PI. 72, figs 741, 742; PL 115, fig. 1044) 



O* $ (PI. 115, fig. 1044). Hyaline area of wings tinged with light buff, distal margin finely 

 light brown, evenly curved from costa to posterior margin on each wing; costa and posterior 

 margin of fore wing light buff, the former irrorate with greyish brown; discocellulars finely 

 and sparsely light buff. Non-hyaline terminal area of each wing fawn colour sparsely irrorate 

 with light brown; subterminal fascia not marked; cilia fawn. Underside of non-hyaline 

 terminal area brown, paler terminad; apical area of fore wing light buff; terminal interneural 

 spots brown. 



The male hind tibia is dilate enclosing a dense tuft of white hair-scales, the tuft almost as 

 long as the tibia. 



$ genitalia (Text-figs 337, 338). Closely similar to those of dilata and enippe, differing 

 in the dilation of the basal part of the dorsal process of the valve; in clenchi it is more extensive 

 and has a crenulate perimeter, bearing long setae as in enippe. 



$ genitalia (PI. 72, figs 741, 742). Closely similar to those of dilata, but differing in the 

 form of the serrate posterior margin of the lamella antevaginalis ; in dilata there is a U-shaped 

 excavation at the left side; in clenchi the left-hand three-fourths extends transversely without 

 such an excavation. 



Measurements. Fore wing: ^0. 17-19 mm. Antennal pectinations: $ 7 X, $ 5 X diameter 

 of shaft. 



