LIFE-HISTORY OF APORIA CRAT.EGI. 251 



April 4th. — They now roam more from their nest by day. 



April 9th. — One larva shed its winter coat, and is now much 

 more hairy and brightly coloured, much like Malacosoma {Bom- 

 hijx) castrensis. 



April 16th. — All three larvae have now shed their winter coat, 

 the largest being five-eighths of an inch long. 



April 17th. — Gave fresh food, whitethorn and plum, larvae at 

 once attacking the latter. 



April 21st. — Largest larva laid up for final moult. Only 

 slight traces of a web have been made since changing food. 



May 1st. — Description of largest larva : About one inch long, 

 rather flabby ; curls in a loose ring when touched, but immedi- 

 ately relaxes and crawls away ; rests on a few silken threads 

 stretched over a plum-leaf; feeding rapidly in the sunlight. 

 Head and second segment black, dorsal line black, then a red 

 brown band interrupted by black at the divisions of the segments, 

 then another black band ending just above the spiracles ; ventral 

 area grey ; spiracles nearly black. The whole body is clothed in 

 dense silky hairs, the longest nearly one-eighth inch long, all 

 grey on the ventral area, the longer ones on the other parts of 

 the body being also grey, while the short hairs on the red-brown 

 parts are red-brown. Legs black, claspers grey. 



May 13th. — Largest larva forming silk pads for pupation, 

 being now one and a quarter inches long. 



May 19th, 21st and 24th. — Dates of pupation. Pupa nearly 

 one inch long, pale greenish yellow, with dorsal line on thorax, 

 outlines of head and collar and entire ventral surface black ; a 

 chain of black spots along the hind margin of wing-cases, and a 

 row of four or five large black spots across disc ; abdomen also 

 spotted with black. Point of head, spots on collar, and spira- 

 cular line bright yellow, towards which colour the ground colour 

 inclines in some places, notably thorax and dorsal line on 

 abdomen. 



June 12th. — Second pupa developing for emergence. The 

 wing-case appears to have extended by the unfolding of a crease 

 on its hind margin, thus leaving a pale border beyond the chain 

 of black spots, both these and the discal spots being now seen to 

 be between the wing rays. 



June 11th, 17th and 21st. — Imagines emerged (one male, 

 two females), being about a fortnight earlier than the normal 

 time of emergences in the wild state for this season. 



" Kingsfield," Hunters Forstal, Heme Bay : 

 Sept. 22ncl, 1903. 



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