RESEMBLANCES AMONG ANIMALS. 63 



following original observation : " I myself have more 

 than once mistaken Cilix compressa, a little white and 

 grey moth, for a piece of bird's dung dropped upon a 

 leaf, and vice versa the dung for the moth. Bryophila 

 Glandifera and Perla are the very image of the mortar 

 walls on which they rest ; and only this summer, in 

 Switzerland, I amused myself for some time in watch- 

 ing a moth, probably Larentia tripunctaria, fluttering 

 about quite close to me, and then alighting on a wall of 

 the stone of the district which it so exactly matched as 

 to be quite invisible a couple of yards off." There are 

 probably hosts of these resemblances which have not 

 been observed, owing to the difficulty of finding many 

 of the species in their stations of natural repose. Ca- 

 terpillars are also similarly protected. Many exactly 

 resemble in tint the leaves they feed upon ; others are 

 like little brown twigs, and many are so strangely 

 marked or humped, that when motionless they can 

 hardly be taken to be living creatures at all. Mr. 

 Andrew Murray has remarked how closely the larva of 

 the peacock moth (Saturnia pavonia-minor) harmonizes 

 in its ground colour with that of the young buds of 

 heather on which it feeds, and that the pink spots with 

 which it is decorated correspond with the flowers and 

 flower-buds of the same plant. 



The whole order of Orthoptera, grasshoppers, locusts, 

 crickets, &c., are protected by their colours harmoniz- 

 ing with that of the vegetation or the soil on which 

 they live, and in no other group have we such strik- 

 ing examples of special resemblance. Most of the 



