( xii ) 



from chrysippus except in the case of very fresh specimens, 

 which are a trifle brighter in colour. This superiority of 

 resemblance over misippus or the other mimics of chrysippus 

 is, I think, mainly due to the flight being so much more like 

 that of the model. Though hardly so regardless, or rather 

 unconscious, of danger as L. chrysippus appears to be, it is 

 remarkably bold on the wing and decidedly easier to catch 

 than misippus. 



" The resemblance on the wing between P. poggei and its 

 model is so close that it suffices to deceive the insects them- 

 selves, and on at least one occasion I have seen one of each 

 species chasing the other, and flirting together for several 

 seconds before discovering their mistake. 



" Carpenter's discovery of a form resembling the dorippus 

 var. is of the utmost interest, more especially as his descrip- 

 tion of the locality indicates a decidedly drier region than 

 those I found the insect in, and therefore one in which this 

 variety of the model may well be the dominant one." 



Pseudacraea poggei, Dew., forma mimetica n. carpenteri. 

 The differences between carpenteri and the type form are 

 almost confined to the fore-wing, just as those between 

 dorippus and chrysippus. In the following description the 

 fore-wing is always to be understood when the hind- wing is 

 not specially mentioned. The essential difference between 

 carpenteri and the type form is a reduction in the black fore- 

 wing markings and the replacement of the white by a paler 

 tint of the orange ground-colour, changes which transform 

 the butterfly from a, mimic of chrysippus into a mimic of 

 dori ppus. 



The reduction of black. — This reduction is chiefly manifest 

 in the apical region of both surfaces and is remarkably com- 

 plete, leaving no trace of an edging to the vestigial oblique 

 bar such as is often seen in other mimics of the same model, 

 and especially strongly in the inaria , of Hypolimnas misippus. 

 The black apical area persists as a marginal band nearly 

 uniform with that round the hind-wing and other parts of 

 the fore-wing — as in dorippus. Within this apical margin 

 -'•uttered black scales only exist in sufficient numbers to pro- 

 duce a distinct effect in relatively few specimens, and these 



