( xvii ) 



II and III was such as to prevent any accurate comparison. 

 The female offspring of both these were remarkably uniform 

 in the possession of a small patch like that of the Danaine 

 model. The fact that the difference in the pattern is un- 

 doubtedly hereditary made it possible to understand the gradual 

 origin of the Eastern hippocoon from the Western or vice versa. 



3. The white spot in the forewing cell of the hippocoon 

 females of Family I was small and divided, hourglass-like, 

 by a constriction, in 8 specimens. In 11 females of 

 Family II and in 8 of Family III the same spot was greatly 

 lengthened by an additional terminal section, generally sepa- 

 rated from the rest of the spot, and very minute in some 

 individuals (especially so in Family III). The condition of the 

 parents unfortunately prevented any accurate study of this 

 marking, but there could be no doubt that the hereditary 

 tendencies of Family I differed from those of Families II and 



III in this as in the features described in the two preceding 

 paragraphs. 



Monkeys eating Butterflies. — Professor Poulton drew 

 attention to the following letter, received by Mr. W. A. 

 Lamborn from Captain H. Y. Neal, giving further details in 

 support of the statement in the Pioceedings on p. iv. 



" Epe [50 miles E. of Lagos], 



''Jan. 22, 1912. 



" You have asked me about monkeys eating butterflies. 

 This is very common, as every native will tell you. I have 

 seen it myself. The monkey runs along a path, sees some 

 butterflies fluttering round some filth, goes very quietly, and 

 seizes one by the wings, puts the solid part [body] into his 

 mouth, and then pulls the wings off. The poor butterfly goes 

 down like an oyster. Of course you know that butterflies are 

 very dirty feeders. Perhaps you have tried your own monkeys 

 with a few butterflies. The dog-faced baboon and the large 

 brown monkey with a very long tail, which seems to be the 

 most common species in this colony, are great butterfly- 

 eaters. The little spider-monkey also considers a butterfly a 

 treat, and prefers one to a spider. I think I have told you 

 the tale of an old native lady at Akwe [^ who saw me 



PROC. ENT. SOC. LOND., II. 1912. B 



