REVISION OF GENUS ZAMARADA 173 



9 genitalia (PI. 59, figs 688, 689). Apparently identical with those of denticatella. 



Measurements. Fore wing: <J 13-14 mm; 9 15 mm. Antennal pectinations: <$ 10 x , 

 $ 4 X diameter of shaft. 



Distinguished from the closely related denticatella by the denser grey striation 

 of the hyaline area of the wings and its smoother, less crenulate distal margin 

 and by the uniformly grey non-hyaline terminal area. Distinguished further in 

 the male by the more slender sclerotized and scobinate fultura superior and in 

 the female by the rather longer antennal pectinations. 



Distribution. Rhodesia. 



Material examined. 



Zamarada densisparsa Prout, holotype $, Rhodesia: Salisbury, 24.vii.1918 

 (J. O'Neil), Geometridac genitalia slide no. 5911, in BMNH. 



Rhodesia: Salisbury, vi, vii (J. O'Neil), 3^2$ (BMNH). 



Zamarada fessa Prout 

 (Text-figs 286, 287; PL 60, figs 690, 691; PL 112, figs 1009, 1010) 

 Zamarada fessa Prout, 1912 : 199. Holotype 9. Rhodesia (BMNH) [examined]. 



0*9- (PI. 112, figs 1009, 1010). Hyaline area of wings lightly irrorate with grey and slenderly 

 edged distally with dark grey to black; discal spots dark grey. Costa of fore wing usually 

 tinged with brownish orange and irrorate with grey. Non-hyaline terminal area orange-grey 

 (pi. 5, B2) to brownish grey (pi. 5, C2, birch-grey), usually uniformly coloured; little trace of 

 a subterminal fascia in the female, but sometimes with a well defined brownish orange (pi. 5, 

 C6), dentate subterminal fascia present in the male, the fascia in some examples sharply and 

 slenderly edged distally with dark grey or black, except in discal area. Underside of 

 non-hyaline terminal area uniformly greyish brown (pi. 5, D3). 



(J genitalia (Text-figs 286, 287). Longitudinal ridge, parallel with sclerotized and coarsely 

 scobinate ventral margin of valve, extends basad along mid-valve from three-fourths dorsal 

 margin; acicular apical projection from near apex of longitudinal ridge. 



9 genitalia (PI. 60, figs 690, 691). 



Measurements. Fore wing: rf n^-^'omm; 9 12-5-16-0 mm. Antennal pectinations: 

 6* I 5 x > $ 3 x diameter of shaft. 



Specimens of the fessa-group in which the non-hyaline terminal area of each 

 wing is uniformly brownish orange or in which the costa of the fore wing and the 

 subterminal fascia of each wing are well defined with brownish orange may be 

 safely determined as fessa. In the male the form and position of the sclerotized 

 ridges on the ventral surface of the valve are diagnostic; in the female genitalia 

 the form of the sterigma serves to distinguish fessa from the closely similar 

 euterpina, known only from Tanzania, but not from eroessa or dorsipiaga, which 

 for the present can be determined only by wing pattern and association with 

 known males. 



Distribution. Rhodesia. 



