LEPIDOPTERA. 171 



with its dorsal horn or tail, peculiar to the larvae of 

 all the SphingidcB, and its diagonal stripes of violet 

 and white on a ground of bright apple green, could 

 not fail to attract the notice of any one in search of 

 insects. I have therefore imagined the prize captured 

 and placed in the Vivarium, and there provided with 

 a fresh sprig of privet, placed in one of the water- 

 bottles every day to furnish fitting food. Such a 

 Caterpillar attains its full growth towards the 

 end of August or beginning of September, when it 

 Avill be found to leave off feeding. After a little 

 uneasy rambling, and having become of a dirty red 

 colour, it will then proceed to burrow into the earth 

 to undergo its change. It should be left undisturbed 

 in its subterranean retreat till the following June or 

 July, when the large brown chrysalis may be taken 

 out and placed in a moist and shady part of the 

 Vivarium, where the first symptoms of the cracking 

 of the pupa and the appearance of the Moth may 

 be conveniently observed. It is true that this dis- 

 turbance of the nest and of the natural position 

 of the pupa may in some degree interfere with its 

 perfectly healthy development, but yet the spec- 

 tacle of the exit of the Moth from its prison must 

 not be lost ; and we will suppose that a few other 

 chrysalides of the same kind are still left in the 



