24 SPHINX CONVOLVULt. 



times also on C. sepiu/m, and in gardens on 0. tricolor 

 and Ipomcea coccinea. And in a letter to Mr. G. C. 

 Bignell, Mr. G. F. Mathew, R. N., mentions that in 

 Madeira it is said to be common in gardens feeding on 

 all sorts of Convolvulus, on lettuce, and other garden 

 plants. 



Potato fields in soils which Convolvulus arvensls 

 affects, would seem to be the most likely hunting 

 grounds in England; July? August and September 

 should be the proper months in which to look for it. 

 Boisduval, after making two grand varieties, the green 

 and the brown, proceeds to enumerate no less than 

 three sub- varieties under each of these heads, and then 

 says that besides these six there are yet others to be 

 found. 



To complete my history of the individual I had 

 the pleasure of watching, I may say that it increased 

 slightly, though perceptibly in length and bulk, till on 

 the fourth day it ceased to eat, became extremely rest- 

 less and active, and on being supplied with soil, entered 

 it for pupation on the evening of the fifth ; unfortu- 

 nately, however, it died without completing the change, 

 the earth proving too dry and friable, for I found it 

 had not been able to make a chamber for itself, after 

 having gone down to a depth of two inches. 



The pupa which, as mentioned by Mr. Walker 

 (' Ent. Month. Mag.,' vol. IX, p. 162), had been found in 

 a potato field, in the Isle of Sheppey, reached me on 

 the 11th December, 1872, in lively condition, and I am 

 glad to say it bore the journey hither and back, as well 

 as the ordeal of sitting for its portrait, without any 

 detriment. 



The larva, when full-grown, measured exactly four 

 inches, and in diameter five-eighths of an inch ; it was 

 cylindrical though tapering gradually from the fifth 

 segment to the head, which was decidedly the smallest 

 segment and flattened in front, the thirteenth also 

 tapered a little at the end ; the twelfth bore a smoothish 

 pointed caudal horn, arching backwards over the anal 



