( xv ) 



and of a pale costal spoi on its basal side, appears to be 

 clearly mimetic. 



On the under surface of the fore-wing the mimicry of 

 carpenteri is Ear closer than that of the type, because of the 

 differences in the apical section. Here the Mack area of the 

 type is overlaid by streaks of white scales, producing a very 

 imperfect resemblance to the characteristic pale tint of chry- 

 sippus in the same region of the under surface. In carpenteri 

 the white covering scales are retained, and these, combined 

 with the orange scales which have replaced the black (as well 

 as i he white over the site of the bar), produce a resemblance 

 to the corresponding part of dorippus which is far closer than 

 that between poggei and chrysippus. 



The last point concerns the ground-colour of both fore- and 

 hind-wings, and its resemblance to that of the models. In 

 Ethiopian examples of chrysippus the upper surface of the 

 fore-wing is generally of a darker Sienna brown than the 

 hind, and increases in depth of shade towards the costa. 

 The fore- and hind-wings of dorippus are more nearly of the 

 same tint and much paler than the usual tint of Ethiopian 

 examples of chrysippus, being of a brownish orange and 

 sometimes of a pale, sand-like colour, and the costal darken- 

 ing is less marked or wanting altogether. In carpenteri also 

 the fore-wing is paler than in the type and less darkened 

 towards the costa, producing a more uniform appearance 

 clearly mimetic of dorippus. 



It is of special interest that, as ('apt. Carpenter has re- 

 marked, the dimorphism between the two forms of Ps. poggei 

 should be so complete far more so than in the females of 

 //. misippus or the daira and type forms of Acraea encedon. 

 The only mimic of chrysippus which approaches poggei in this 

 respect is Mimacraea marshalli, Trim., with its dorippus-like 

 race dohertyi, Efcothsch., but this latter has not yet been found 

 in the same locality as marshalli, so that true dimorphism has 

 yet. to be proved for t he species. 



Among the fifty examples of the type form from Lulanguru, 

 a single one. a female captured Nov. 3, exhibits a slight but 

 distinct trace of orange scaling on the black apical area 

 beyond 1 he white bar of t he fore wing upper surface (see p. ix). 



