( 360 ) 



bar R' — M' fi to 74 mm. from base of M', bar R- — R' If to 2i mm. from cross-vein 

 D', never touching bar D, which is obsolete behind ; discal patches R^ — SM'^ tawnv 

 chestnut, much paler than the postdiscal patches and the marginal area ; postdiscal 

 yellowish buff interstitial spots smaller than in caranes, spot SC* — SO' often present, 

 double spot M- — SM- often obsolete ; submarginal interstitial spots also smaller, 

 often minnte, seldom nearly all absent, extreme outer edge tawny, fringe not dis- 

 tinctly white between veins, though there are occasionally a very few white scales at 



the interncrvnlar folds on the underside. Hindwing : the creamy ba'sal area 



posteriorly less extended than the white area of caranes, and also less well defined, 

 gradually shading into the outer area ; discal line of underside showing through, 

 anteriorly generally marked by tawny scaling ; postdisco-submarginal round patches 

 nearly black, variable in size, seldom with a white dot inside : brownish black 

 admarginal bars larger than in caraytes, less arched, the upper four larger than the 

 last three, margin outside these bars and tail distinctly paler than admarginal area, 

 creamy at upper angle ; tail not spatulate, broader at base than in varanes, hence 

 margin more oblique from tail to anal angle, tooth at M' generally less obvious than 

 in varani's. 



Underside : ground colour pale straw yellow, much shaded with clay colour ; 

 bars black, thin, prominent on account of the pale ground colour, with a thin, glossy, 



whitish border in side-light ; discal line less black, more dark clay colour. 



Forewing : discal line more sharply angled before R- than in varanes, and more 

 concave behind, its costal part often liroken up into spots ; in most specimens the 

 I)0stdiscal spots represented by sharply marked dots ; median bars R^ — SM' in 

 varanes at about equal distance from discal line, in fulvescens bar R' — M' farther 



away from the line than bars M- — SM'. Hindwing : proximal border of ocellate 



postdisco-submarginal spots not chestnut, but tawny olive, black ring of upper 

 ocellus heavy, sharply marked also distally, submarginal black bars of ocelli 

 SC' — M' generally represented by a tiny, but conspicuous, black dot, central parts of 

 ooelli M' — (SM') all white, not shaded with ochraceous ; admarginal black spots 

 much smaller than in varanes, but sharper defined, more obvious, with or without 

 tiny white spots at distal side which are never distinctly transverse as in varanes ; 

 fringe with dispersed white scales, especially behind tail; no white spots at inter- 

 nervular folds. 



Length of forewing : cJ, 39 — 48 mm. 

 „ „ ? , 48 — 54 mm. 



Penis and penis-funnel as in Ck. varanes ; clasper constantly different ; the 

 apical tooth thinner, more curved, its upper surface less concave (PI. 8. f. 25.). 



Larva and chrysalis unknown, most likely not essentially different from those 

 of Cli. varanes. 



Hah. West African Forest Region, from Sierra Leone to Angola and Uganda. 



Ch.fuhescens is constantly different in the characters of the wings and claspers 

 from varanes, and there are no intergradations. The two insects occur together in 

 the same place at the same time of the year, as our material jiroves ; hence varanes 

 and fulvescens can neither be geographical nor seasonal varieties. Against there 

 being forms of a dimorphic species tell the following facts : (1) that two insects are 

 distinguished by differences in the claspers of the 6 6; (2) that the differences 

 presented by the wings are found in both sexes, without there being any intergrada- 

 tions between the two insects ; (3) that fulvescens does not occur in East Africa 

 projier, though varanes of West and East Africa are not subspecifically separable. 



