14 OOLIAS EDUSA. 



They continued to feed and grow, consuming a great deal 

 of food, stripping bare the stems of plant after plant, 

 appearing to be very hardy, not flinching in the least 

 from any amount of water poured over them when the 

 plants were being watered, apparently not noticing it 

 in the least. On the approach of cold frosty nights 

 they remained stretched out still and passive, seeming 

 to feed only by day. 



On the 15th of October I found that one had changed 

 to a pupa on the bottom of the window-frame in a 

 horizontal position ; two full-fed larvae had also 

 crawled on to the perpendicular frame of one of the 

 lower panes of the window, another also on the corre- 

 sponding frame of the same pane. On looking the 

 next day I saw that this one was head downward, but 

 the following day it had its head upward like the other 

 two larvae, which still remained and were indeed fixed, 

 their cinctures being distinctly seen. 



October 22nd. — I happened during the morning to 

 look at one of the two spun-up larvse above mentioned, 

 and saw that its head was no longer bent down but 

 stretched out in a line with the body, and that it was 

 moving it forwards and from side to side. In a few 

 seconds the skin broke away from the back of the head 

 in the centre, and split open down the centre of the 

 back, from which it slid away down each side, exposing 

 four segments of the soft yellow-green surface ; and 

 now the head-piece split in two from the crown to the 

 mouth, each half seemingly pushed aside by a conical 

 projection growing rapidly out of each cheek. A few 

 heavings of the front parts soon caused the larval 

 head-piece to shrink away from the head of the pupa, 

 still attached to the skin, which kept sliding away 

 downwards and backwards; after the skin had slid 

 away from under the cincture on the back, a heave 

 upwards of the larva caused the cincture to sink in and, 

 as it were, to become firmly embedded in the yet soft 

 surface of the pupa. Up to this point the operation 

 had lasted seven minutes. 



