124 THE BUTTERFLY VIVARIUM. 



resting, as I have endeavoured to show in a Moth 

 of this species just escaped from the chrysalis, in 

 Plate IV. No. 2. 



A similar effect may he observed in the wings of 

 the Peacock Butterfly — the fine ocellated marks of 

 which have a very charming effect when in this 

 state ; forming an exquisite miniature model of the 

 grand and gorgeously tinted design they are so soon 

 destined to exhibit. These are the phenomena that 

 must he eagerly watched for in the Vivarium ; they 

 are among the most interesting spectacles it can 

 offer, and the student must therefore take care that, 

 for want of proper attention, they do not pass over 

 without notice ; for a few hours at certain seasons 

 maymake agreat change in a collection of chrysalides. 



By careful observation, the colours, or rather 

 markings of the wings may he distinguished through 

 the shell of the chrysalis, which, as the time ap- 

 proaches for the insect to escape from its prison, 

 appear to become partially transparent — at all 

 events in some kinds of Butterflies — though the 

 more opaque pupa case of Moths do not so fre- 

 quently exhibit this kind of change. In Butterflies, 

 however, by this and other indications, the species 

 may often be detected through the shell of the chry- 

 salis. Moses Harris, one of our enthusiastic ento- 



