142 THE COLOUKS OF ANIMALS 



Confirmatory results obtained by other workers 



It is also interesting to record that many of these 

 results have been since confirmed by independent 

 workers. Mr. G. C. Griffiths worked at the chrysalis 

 of the Small Garden White (Pieris rapce), and con- 

 firmed my results in many important respects. 1 The 

 Eev. J. W. B. Bell and Mr. Pembrey have worked at 

 the pupae of the Small Tortoiseshell and Peacock, and 

 the former also at the pupse of the Large Tortoise- 

 shell. 2 Their results are, on the whole, confirmatory 

 of those described above. 



Variable Protective Resemblance in the colours 

 of cocoons 



It has been already mentioned that the colour of 

 the cocoon in certain species can be adjusted to the 

 environment. I obtained proof of this in 1886, at 

 the suggestion of Mr. W. H. Harwood of Colchester, 

 who had observed that the colour of the cocoon of the 

 Emperor Moth (Saturnia carpini) varied, and seemed 

 to suit its environment. I found that caterpillars of 

 this species spun very dark brown cocoons in a black 

 calico bag (see fig. 31), while white cocoons were 



Trans. Ent. Soc. Lond. 1888, pp. 247 et seq. 

 The Midland Naturalist, Dec. 1889, pp. 289-90. 



