22 D. S. FLETCHER 



laterally-pointing thorn-like projection at three-fourths. No cornutus. 

 Valve membranous ....... ilaria-group (p. 127) 



— Fulcrum simply tapered or bearing angular, lateral projections, symmetrical 



or asymmetrical; apex never scobinate. Aedeagus usually bearing one or 

 more projections, either rod-like and tapered; blade-like and tapered; 

 digitate, smooth or scobinate; or short and truncate, usually extending 

 apicad. Vesica with or without cornuti. If aedeagus is without projection, 

 then vesica always ornamented with one or more cornuti . . . 72 



72 (71) Outer surface of valve fur-like, being densely clothed with short, vertical hair- 

 scales (PI. 94, fig. 835) ...... .prof rasa-group (p. 104) 



- Outer surface of valve not so scaled ..... excavata-group (p. 79) 



The KERA I A -Group 



A group of small East African coastal species with a wing length of 9-1 1 mm. 

 The male genitalia are characterized by the form of the dorsal process of the valve, 

 which is straight and broad with rounded apex, similar to that found in species of 

 Semiothisa. The uncus is tapered, the apex curved ventrad; dorsal surface usually 

 with keel-like ridge, sometimes with digitate projection from base. In inermis 

 the uncus is short with a pair of lateral, shoulder-like projections. In the female 

 genitalia the corpus bursae is sclerotized and ribbed. 



Key to Species 



1 Valve tapered apicad; a tapered process near mid-base. Fulcrum broadened 



apicad to enfold apex of aedeagus. Vesica with two scobinate cornuti . 2 



- Valve simple and of even width to rounded apex. Fulcrum slender and of even 



width to rounded apex. Vesica with a smooth, acicular cornutus, two-thirds 



as long as aedeagus ........ inermis (p. 24) 



2 (1) Apical margin of valve with two short spines projecting caudad. Aedeagus 



without projections ........ keraia (p. 22) 



— Apex of valve without projecting spines. Aedeagus with spine-like projection 



at three-fourths ......... ekphysis (p. 23) 



Zamarada keraia sp. n. 



(Text-figs 5-8; PL i, figs 455, 456; PI. 95, figs 837, 838) 



<^$ (PI. 95, figs 837, 838). Hyaline area of wings greyish yellow (pi. 3, B4-5), irrorate with 

 grey tinged with vinaceous, sparsely in male, moderately in female, and finely edged distally 

 with light yellow (pi. 4, A5), then dark brown and glossy grey; costa of fore wing light yellow; 

 discal spots dark grey; non-hyaline terminal area light yellow, suffused with orange-grey 

 proximally (pi. 5, B2) and sparsely irrorate with orange-grey distally in the male, suffused 

 with orange-grey distally in the female; ill-defined subterminal fascia light brown. 

 Underside of non-hyaline terminal area similar to that of upperside in male, but slenderly 

 marked with greyish brown proximally; fore wing of female uniformly greyish brown, hind 

 wing similar to that of male. Male hind tibia simple. 



<J genitalia (Text-figs 5, 6). Uncus tapered, apex curved ventrad; dorsal surface ridged, I 

 with slight projection near base of ridge. Arms of gnathus joined, forming a shallow, ventral 

 plate. Dorsal process of valve straight, apex broadly rounded and setose; apical margin of' 

 valve with two short spines projecting caudad; a strongly sclerotized spine, equal in length 



