some British East African Butterflies. 521 



only ; while the male, which is destitute of the black and 

 white tip, cannot be said to mimic this Danaine. The 

 habits of both Euryphenes are however markedly different 

 from those of the other members of this combination. All 

 these latter have a leisurely floating flight which increases 

 the resemblance to the model. The Euryphenes, on the 

 other hand, are characterised by a rapid skimming flight 

 close to the ground, on which they are very fond of settling 

 with their wings expanded. In such a position they are 

 really very inconspicuous in the intense light and shade of 

 the woodland and forest habitat which they prefer. They 

 have moreover an under side which is evidently procryptic, 

 and when sitting with closed wings they are exceedingly 

 difficult to detect even when one has actually seen them 

 come to rest. However, it is just possible that they may 

 obtain some advantage from adopting a well-known apose- 

 matic appearance, and it is certainly difficult to account 

 for the pattern of the female in any other way, 



[3Iomhasa, Jan. 31, 1905. 



I must say I have doubts about the species oi Eitryphene 

 which resemble L. clirysipinis being mimics at all. There 

 are two species of this group in the Rabai district, of 

 which one is common and widely distributed in the district 

 [£'. sencgalensis], whilst the other seems much more local 

 [E. chriemhilda]. Both of these have [in the female] the 

 colouring of the type form of Z. chrj/sippus, but their 

 habits are totally different. They are woodland insects, 

 and have a rapid skimming flight about a foot from the 

 ground, on which they are very fond of settling, though 

 they also settle not unfrequently on low bushes. They 

 almost invariably settle with their wings expanded, and 

 frequently remain in this position for a considerable time. 

 In fact, their habits and haunts are so totally different 

 from those of D. chrysippus as to make it exceedingly 

 unlikely that they are in any true sense mimics at all.] 



3. Acrxinc Mimics. Acrxa encedon, L., is quite common 

 everywhere, and the form daira, mimicking doripims, is 

 certainly considerably more abundant than the typical 

 encedon. The fidvescens form of Acrxa johnstoni with 

 other convergent Acroeas belonging to the dorippus- 

 centred combiuation has been already considered on pp. 

 514-517. 



4. Papilionine Mimics. Papilio dardanus, sub-sp. tihdlus, 



