REVISION OF GENUS ZAMARADA 23 



to width of valve, extends longitudinally on inner surface of valve from base; in one example 

 the spine is bifurcate on one valve. Fulcrum weakly sclerotized, broadened apicad to enfold 

 apex of aedeagus, but not extending beyond it. Vesica with two scobinate cornuti, one slender, 

 one-half as long as aedeagus, the other short and equal in length to width of aedeagus. 



0. genitalia (PI. 1, figs 455, 456). Lamella antevaginalis excavate medially, lateral arms 

 broad and spatulate enfolding ostium. Ductus bursae ribbed and weakly sclerotized, about 

 one-half as long as pyriform corpus bursae. 



Measurements. Fore wing: <$ 10-11 mm, $ 11 mm. Antennal pectinations: $17 X, $ 

 6 X diameter of shaft. 



Externally closely similar to Z, delta sp. n. in the pulverosa-group. The male 

 may be distinguished by the longer epiphysis on the fore tibia; the ratio of epiphysis 

 to tibia in keraia is 6 : 7, in delta the ratio is 4 : 7. In the male genitalia the form 

 of the valve and the ornamentation of the vesica and in the female the form of the 

 sterigma are diagnostic. 



Distribution. Kenya Coast, Shimba Hills. 



Holotype $, Kenya: Coast, Shimba Hills, xii. 1961 (R. H. Carcasson), Geometridae 

 genitalia slide no. 7529 in BMNH. 



Paratypes. Kenya: holotype data, 1 <$, 2 $; ibidem, iv. 1964, 1 $. 



Two closely similar males, collected at Amani in Tanzania in February and 

 March by Dr G. Pringle, differ from the type-series of keraia in the presence of 

 a short, digitate projection from the base of the dorsal surface of the uncus and a 

 short, hook-like projection from the dorsal surface of the aedeagus at three-fourths 

 (Text-figs 7, 8). 



Zamarada ekphysis sp. n. 



(Text-figs 9, 10; PL 1, figs 453, 454; PL 95, fig. 839) 



<J °- (PI. 95, fig. 839). Hyaline area of wings weakly tinged with yellowish green, sparsely 

 irrorate with grey along posterior margin of fore wing and finely edged distally with light 

 yellow, then with brown and silvery grey; costa of fore wing light yellow, irrorate with grey 

 tinged with vinaceous; discal spot on fore wing minute, dark grey. Dentate subterminal 

 fascia brown (pi. 6, E6, tan) edged distally with light buff; remainder of non-hyaline terminal 

 area greyish orange (pi. 5, B3) irrorate with brown in male, with brownish grey (pi. 6, C2) 

 in female. Underside of non-hyaline terminal area very weakly greyish orange in male, 

 greyish brown in female. Male hind tibia simple. 



(J genitalia (Text-figs 9, 10). Uncus tapered, apex curved ventrad; dorsal surface setose 

 and keel-like basad, but without projection. Ventral plate of gnathus strongly sclerotized 

 and scoop-like with rounded tip. Valve shaped similarly to that of keraia, but apical margin 

 unspined and basal, tapered process smaller and transversely, not longitudinally, inclined. 

 Aedeagus differs from that of keraia in presence of a spine-like process at three-fourths dorsal 

 surface. Ornamentation of vesica similar to that of keraia, but the more slender cornutus 

 only one-third as long as aedeagus. 



$ genitalia (PI. 1, figs 453, 454). Sterigma asymmetrical; lamella antevaginalis extended 

 ventrally enfolding ostium bursae; a hook-shaped, cylindrical extension dorsally. Ductus 

 bursae and corpus bursae merged to form a pyriform sac, weakly ribbed posteriorly. 



Measurements. Fore wing: <$ 10. 0-10.5 mm; $ 11.5 mm. Antennal pectinations: <J 

 15 X, $ 4 X diameter of shaft. 



