a similar posture it i"emained for about the same space of time, but 

 here, as preyiously, it seemed incommoded by too close proximitywith 

 other stems and leaves, for it again moved off and ascended to one of 

 the upper leaves and crept beneath it, and there, after resting a few 

 minutes, it began to spin a coating of silk, leisurely adding to it at 

 intervals during the evening, and probably during the night, as I 

 noticed next morning some stout threads had been spun from the foot- 

 stalk of the leaf to the main stem, firmly securing the position of oue 

 to the other ; the larva now remained quite still, its head and hoims in 

 line with the body towards the stem, and its tail a little way from the 

 tip of the leaf, the back much arched, the anal pair of legs securely 

 fixed in a pad of silk, and the first ventral pair clinging to the silken 

 carpet which they dragged off a little from the leaf at the point of 

 contact ; the assimilation in colour to the under-side of a sallow leaf 

 was very perfect. 



Larva No. 2 completed its third moult on September 5th, then, 

 seven-eighths of an inch long ; after this, it was kept apart, feeding 

 well, and attaining the length of about two inches by the 25th of the 

 month ; and on the 28th, had spun its carpet under a leaf, and secured 

 itself similarly to the preceding. 



Larva No. 3 moulted a second time on the 3rd of September, when 

 its length was just half an- inch ; from this time it fed very sparingly, 

 often changing its position as its food was changed, until the 25th of 

 the month, when I found it was hibernating on the stem of a twig, the 

 hinder half of its body enveloped in a mass of silk where it remained 

 immovable ; only by very gently touching its horns occasionally, as 

 winter advanced, could I be sure it was alive. 



Beyond keeping them in a room of v.hich the window was 

 closed only at night, I was unconscious of any thing 1 had done to 

 stimulate premature development of the two larvae which so rapidly 

 attained full growth: certainly I attended to them carefully, and 

 watched them with much intei-est, especially while feeding, an operation 

 I noticed performed oftener by night than by day. 



After moulting, the green colour of the larva was at first very pale, 

 like the under-side of a sallow leaf, for a day or two, for which period 

 it would remain on the under-side of a leaf, until its green colour had 

 become brighter and darker, when it would again rest on the upper 

 surface of the leaf ; after the last moult, and sometimes before, each 

 larva had a special leaf spun over the upper surface with silk, on which 

 it rested in such a position that its head was facing the footstalk, and 



