24 D. S. FLETCHER 



Similar in size and habitus to Z. ordinaria Bethune-Baker in the pulverosa- 

 group, but distinguished externally by the clearer, greener-tinged hyaline areas of 

 the wings and by the presence of a minute, discal spot on the fore wing and the 

 absence of a discal spot from the hind wing; in ordinaria the discal spot on the 

 fore wing is usually in the form of a small, dark-margined ring and the discal spot 

 on the hind wing is always present. Males may further be distinguished by the 

 appreciably longer epiphysis on the fore tibia; the ratio of epiphysis to fore tibia 

 in ekphysis is 6-5 : 8, the ratio in ordinaria is 5 : 8. In the genitalia the form of 

 the valve and ornamentation of the vesica in the male and the form of the sterigma 

 in the female are diagnostic. 



Distribution. Kenya. 



Holotype $, Kenya ('Brit. E. Afr.'): Kiboko R., 5.XL1896 (Dr Ansorge), Geo- 

 metridae genitalia slide no. 7965, in BMNH. 



Paratypes. Kenya: Kibwezi, 12.iii.1917 (W. Feather), 1 $ without abdomen, 

 1?. 



Zamarada inermis sp. n. 



(Text-figs 11, 12; PL 2, figs 457, 458; PL 95, fig. 840) 



^ 9 (PI- 95- fig- 840). Hyaline area of wings tinged with glaucous green, very sparsely irrorate 

 with grey, tinged with vinaceous, and with brown, the latter forming a broken medial fascia; 

 terminal margin of hyaline area very slenderly light yellow, then dark brown; discal spots 

 dark brown, minute; costa of fore wing light yellow and orange-grey irrorate with dark 

 brown. Non-hyaline terminal area orange-grey (pi. 5, B2); dentate and broken subterminal 

 fascia dark brown and cinnamon-brown, weakly marked in female with cinnamon-brown 

 predominating, strongly marked in male with dark brown predominating, especially in discal 

 area of each wing and tornal area of fore wing. Underside of non-hyaline terminal area of 

 each wing pale orange-grey. Male hind tibia simple. 



O* genitalia (Text-figs 11, 12). Uncus very short and tapered with a pair of lateral, shoulder- 

 like projections; dorsal surface setose. Ventral plate of gnathus broad and shallow, 

 minutely scobinate medially. Dorsal process of valve straight, apex broadly rounded; rest 

 of valve simple, parallel-sided, twice as broad as dorsal process; apex of dorsal margin very 

 weakly sclerotized and shortly produced; ventral margin minutely scobinate. Fulcrum 

 slender and straight, of even width to rounded apex and just subequal in length to aedeagus. 

 Vesica with one slender, acicular cornutus, two-thirds as long as aedeagus. 



9 genitalia (PI. 2, figs 457, 458). Dorsal margin of lamella antevaginalis shallowly 

 excavate medially, the whole enfolding the ostium bursae. Lamella postvaginalis produced 

 posteriorly as a boldly rounded lobe. Ductus bursae sclerotized and ribbed, twice as long 

 as ovate corpus bursae. 



Measurements. Fore wing: g 9.5-10.0 mm; $ 10 mm. Antennal pectinations: (J 15 X, 

 $ 3 X diameter of shaft. 



Externally closely similar to Z. delta sp. n. in the pulverosa-group; distinguished 

 by the minute, solid discal dots, those of species in the pulverosa-group being usually 

 small, dark-margined rings. In the genitalia the form of the uncus and valve 

 and the ornamentation of the vesica in the male and the form of the sterigma 

 and ductus bursae in the female are diagnostic. 



