A REVISION OF THE ETHIOPIAN DREPANIDAE (LEPIDOPTERA) 95 



Meso- and metathoracic legs with one pair of apical spurs. Apex of fore wing variously 

 falcate ; outer margin evenly convex, or convex only anterior to Cu lb . Hind wing either 

 sharply angled at outer angle with almost straight outer margin, or with rounded outer angle and 

 slightly convex outer margin. Venation of fore wing as in Text-figs. 153, 162. In the hind 

 wing Sc + R 1 anastomoses with Rs for some distance distal to end of cell. 



Ipper surface of both wings brown or yellow, speckled with darker tones. Oblique post- 

 medial fascia usually present on fore wing from near apex to about middle of anal margin ; 

 several circular or irregularly shaped hyaline patches in and around distal end of cell ; three dark 

 markings equally spaced along distal half of costa. Sub-basal fascia of hind wing continuous 

 with postmedial fascia on fore wing ; discocellular spot and posterior cell-spot very dark ; 

 hyaline patches present distal to end of cell in some specimens oi subviridis, pianola and 

 excentrica. (See Plates 9 and 10.) 



Under surface of both wings paler than upper surface ; variously coloured, but invariably 

 strongly speckled with dark brown ; postmedial fascia of fore wing sometimes present, hyaline 

 patches often edged with dark scales ; hind wing with trace of postmedial fascia in a few 

 specimens (not present on upper surface). 



Colour of abdomen doubtful but probably similar to corresponding adjacent surface of hind 

 wing. 



o* genitalia (sec labelled Text-fig. 180) : uncus hood-like ; gnathus with single, pointed, 

 medial process ; saccus broad, shallow ; diaphragma membranous ; valve bifurcate ; 

 vinculum variously produced anterior to base of valves into heavily sclerotized processes ; 

 aedeagus sometimes with lateral lobes, vesica without cornuti ; eighth tergum little modified, but 

 with short apodemes ; eighth sternum weakly sclerotized, posterior margin arcuate or emarg- 

 inate, apodemes long. 



$ genitalia variously shaped ; anterior and posterior apophyses well developed ; bursa 

 COpulatrix with single pair of scobinate signa ; ostial segment sometimes with globose, medial 

 lobe dorsally. 



Discussion. Spidia is probably most closely related to the Madagascar! Croci>iis 

 Butler, which may be a derivative of Spidia. It can be distinguished from Crocinis, 

 in the male, by the shape of the valves, saccus and eighth abdominal sternite, and 

 by the presence of a gnathus and a poorly developed anellus. The colour-pattern 

 and, to a lesser extent, the coloration of Spidia are similar to Isospidia gen. n., but 

 the genitalia bear little resemblance. In the similarly patterned Negera Walker the 

 transverse fasciae are much closer to the outer margin on the upper surface of both 

 fore and hind wings than in Spidia, the antennae are bipectinate and the genitalia 

 are diagnostic. 



One species of this genus, fenestrata Butler, has already been treated critically 

 and attention drawn to the high degree of individual variation of the coloration 

 (Watson, 1957). Similar but less striking variation is exhibited by most species of 

 Spidia. 



The shape of the antenna is a diagnostic character in rufinota. In this species the 

 antenna is closely lamellate unlike that in any other species of the genus, including 

 fenestrata to which rufinota is probably closely related. The wing shape of smithi 

 is quite different from that of inangulata but the male genitalia indicate close 

 affinities between these two species. The remaining species, sitbviridis, excentrica, 

 pianola and miserrima are clearly closely related to each other. 



One species, fenestrata, is polytypic. Two further species, subviridis and smithi, 

 are probably polytypic. 



