150 THE BUTTERFLY VIVARIUM. 



single occasion ; one of his mistakes of this kind, 

 in reference to a species of the present genus Papilio, 

 having been only recently corrected by the aid of 

 recent discoveries of fresh specimens of both sexes. 



The underside of the wings of the common White 

 Butterfly are as well worthy of remark as the 

 upper, and they are in many respects different in the 

 markings. The black tip of the anterior wings on the 

 upper surface, for instance, is replaced underneath 

 by a similarly shaped mark of delicate yellowish 

 butf; and the underside of the posterior wings is en- 

 tirely of this warm yellowish buif colour, so minutely 

 powdered with black specks that it requires some 

 care and an eye accustomed to close observation 

 to detect this extra and seemingly superfluous 

 decoration. These are but a few of the delicate 

 beauties that might be pointed out in the common 

 White Butterfly, whose dress to common eyes is 

 simply white, and nothing more. 



The specimen figured in Plate III. may be sup- 

 posed to be a female, captured in the first days of 

 May, and placed in the Vivarium just as she was 

 ready to deposit her eggs. This she will in most 

 cases do, undisturbed by her new position. 



The common White Butterfly was the one se- 

 lected by Swammerdam as well fitted to illustr 



