128 BOTYS LANCEALIS. 



the boundary of a plate defined on either side by a series 

 of four black dots decreasing in size from the front ; 

 on the rest of the back a dark green dorsal stripe, 

 which is attenuated a little towards each end, its 

 course relieved on either side by a broad stripe of 

 opaque pearly greyish-white, followed by a broader 

 semi-transparent green stripe, distinct without hard- 

 ness, margined below by a thread-like opaque whitish 

 line which thickens as it approaches each segmental 

 division ; on this line are situated the small circular 

 black spiracles ; all beneafch, including the belly and 

 legs, have a pale watery tint of greenish ; the tuber- 

 cular warts have each a fine silky hair ; the whole skin 

 is tense, shining, and more or less translucent. 



On the 25th of August this larva ceased to feed, 

 left the plant, and spun a web in a corner at the top 

 of its cage, having by degrees become of a beautiful 

 opaque rose-pink colour on the back, and greenish- 

 flesh colour on the belly, destitute of any line or stripe, 

 the head alone remaining unaltered in colour and 

 markings. 



By the 31st I found the web completed ; it was of 

 triangular shape, composed of whitish silk enclosing a 

 space an inch in length ; within was a hammock-like 

 cocoon of finer white silk, and in this lay the larva. 

 Its colouring again changed to a uniform flesh tint, 

 and from this time it rested quiescent, without any 

 further change in its appearance, until the last week 

 in April, 1875, when I saw its position was different, 

 and it seemed a little shorter and thicker than before ; 

 on the 3rd of May I found it had pupated. 



This pupa was three-eighths of an inch in length, 

 moderately slender in form, with the wing- and 

 antenna-cases long, the abdominal tip terminating 

 with four or five minute bristles converging at their 

 extremities, which were entangled in the silk of the 

 cocoon, the old larval skin lying behind them; the 

 colour of the pupa was a very pale brown, with shining 

 surface. 



