RESEMBLANCES AMONG ANIMALS. 59 
because the butterfly always rests with his wings raised 
so as to conceal the dangerous brilliancy of his upper 
surface. It is probable that if we watched their habits 
sufficiently we should find the under surface of the 
wings of butterflies very frequently imitative and pro- 
tective. Mr. T. W. Wood has pointed out that the 
little orange-tip butterfly often rests in the evening on 
the green and white flower heads of an umbelliferous 
plant, and that when observed in this position the beau- 
tiful green and white mottling of the under surface 
completely assimilates with the flower heads and ren- 
ders the creature very difficult to be seen. It is pro- 
bable that the rich dark colouring of the under side of 
our peacock, tortoiseshell, and red-admiral butterflies 
answers a similar purpose. 
Two curious South American butterflies that always 
settle on the trunks of trees (Gynecia dirce and Calli- 
zona acesta) have the under surface curiously striped 
and mottled, and when viewed obliquely must closely 
assimilate with the appearance of the furrowed bark 
of many kinds of trees. But the most wonderful 
and undoubted case of protective resemblance in a 
butterfly which I have ever seen, is that of the 
common Indian Kallima inachis, and its Malayan 
ally, Kallima paralekta. The upper surface of these 
insects is very striking and showy, as they are of 
a large size, and are adorned with a broad band of 
rich orange on a deep bluish ground. The under 
side is very variable in colour, so that out of fifty 
specimens no two can be found exactly alike, but 
