10 COLIAS EDTJSA. 



supply of food had not been equal to the demand, for 

 when I saw them, on the 6th of July, their numbers 

 had greatly decreased and the survivors were cluster- 

 ing on the bare stems of the plants they had stripped 

 in the course of the day. 



From that time they were abundantly supplied with 

 fresh food, and though their progress seemed satis- 

 factory, it soon became evident that they had not been 

 able to recover the check sustained when young, for 

 they began to suspend themselves from July 16th, and 

 change to pupae before attaining the size I had hoped 

 for. 



The first perfect insect came forth on the 6th of 

 August, and the others followed during about a week. 

 They were most lovely examples of colour but smaller 

 than ordinary captured specimens. 



After the young larva became green, they so remained 

 through all their subsequent moultings, and no variety 

 worth mention occurred in the brood. Their habits 

 were rather sluggish, especially as they matured. The 

 size attained by the largest was little more than one 

 inch and a quarter in length, moderately stout, of 

 nearly equal size throughout, rounded above and rather 

 flattened beneath, the head globular and rather smaller 

 than the second segment. The segments subdivided 

 by transverse wrinkles or folds into six portions, the 

 second portion the widest. 



The colour was a deep, dull grass-green, the dulness 

 being caused by their being irrorated with excessively 

 minute black points ; and each point emitting a very 

 short fine hair, added a velvety appearance to the sur- 

 face of both head and body. 



In some examples a darker dorsal pulsating streak 

 was visible, though in general hardly noticeable. 



The larva was adorned with a whitish or else a 

 yellow spiracular stripe, which was further embellished 

 on each segment by a pink or red blotch in the middle 

 of it and a black spot immediately under it, while a 

 little in advance of the red was seen the oval whitish 



