i 4 2 D. S. FLETCHER 



Zamarada angustimargo Warren 

 (Text-figs 238, 239; PI. 109, fig. 978) 

 Zamarada angustimargo Warren, 1901 : 212. Holotype <J, Angola (BMNH) [examined]. 



(J (PL 109, fig. 978). Distal margin of greenish white hyaline area of each wing evenly 

 crenulate or dentate, finely edged with black. Narrow non-hyaline terminal area light buff 

 edged proximally with grey; area not wider than 1-5 mm at and posterior of vein M 3 on fore 

 wing. 



$ genitalia (Text-figs 238, 239). Apical half of uncus laterally compressed, dorso-ventral 

 depth equals one-half greatest width of aedeagus. Valves symmetrical, each with a stout, 

 apical spine and a small fold on dorsal margin; dorsal process with a small setose projection 

 at one-fourth. 



§ unknown. 



Measurements. Fore wing: £ 12 mm. Antennal pectinations: $ 10 x diameter of shaft. 



Distinguished externally from other species in the bathyscaphes-group by the 

 slender, even, non-hyaline terminal area of each wing. Structurally closely similar 

 to aequilumata, from which it differs in the male genitalia in the stouter uncus, 

 in the form of the valve and its dorsal process and especially in the presence of a 

 small fold on the dorsal margin of each valve. 



Distribution. Angola. 



Material examined. 



Zamarada angustimargo Warren, holotype J, Angola: Luacinga R., xi. 1899 

 (Penrice), Geometridae genitalia slide no. 5945, in BMNH. 



Zamarada psi sp. n. 



(Text-figs 240, 241; PL 50, figs 650, 651; PL 109, fig. 981) 

 [Zamarada pyrocincta Hampson, 1910 : 470 (part). Misidentification.] 



(J$ (PL 109, fig. 981). Hyaline area of wings greyish white very lightly irrorate with grey; 

 discal spots minute. Non-hyaline terminal area of each wing light brown, shaded with grey 

 proximad of the weakly marked, dentate subterminal fascia. Underside of non-hyaline 

 terminal area light brown shaded proximally with dark grey on fore wing and between costa 

 and vein M 3 on hind wing. 



O* genitalia (Text-figs 240, 241). Valves asymmetrical; right valve broadly rounded at 

 apex, left valve rather more slender, but with a broad-based, tapered process in middle of 

 apical third; dorsal process with a setose dilation at one-fourth. Aedeagus with a small, 

 thorn-like projection just below narrowly rounded apex. 



Cj genitalia (PL 50, figs 650, 651). Closely similar to adiposata, with strongly developed, 

 spine-like projections at each side of operculum; medial area of membranous lamella 

 postvaginalis with concentric, membranous ridges forming a raised lobe. 



Measurements. Fore wing: <§ 11-5 mm; £ n-12 mm. Antennal pectinations: ^ iox, 

 $ 4 X diameter of shaft. 



A species that is most readily recognisable by the form of the strikingly 

 asymmetrical valves in the male genitalia and by the form of the sterigma in the 

 female genitalia. 



