PTEEOPHOEUS BALIODAOTYLUS. 379 



generally assimilate with those which fringe the 

 margins and proceed from the leaves of the plant, as 

 does the green colour of the larva with the under-side 

 of a leaf. 



The first larva spun up on the 1st of June, the 

 others several days later. 



The pupa is of slender form, stoutest across the 

 thorax, seven-sixteenths of an inch long, attached by 

 the tail to a button of silk spun to a stem of its food- 

 plant. The head is well produced, the wing-cases are 

 long and narrow, the leg-covers longer, projecting 

 free towards their tips ; the head and thorax are pale 

 green, the wings deeper and fuller green, the abdomen 

 lightish green, broadly tinged along the back with 

 purplish-brown ; there is a row of purplish -brown 

 tubercles across the middle of each segment, emitting 

 curved bristly white radiating hairs of varying 

 lengths ; and on the longitudinal ridges of the wing- 

 covers are a series of most minute short bristlv hairs. 

 (William Buckler, June, 1879; Note Book III* 262.) 



Pteeophoeus teteadactylus. 



Early in the season of last year, 1885, Mr. Eustace 

 R. Bankes, of Corfe Castle, found a larva on wild 

 thyme, from which he bred a specimen of Pterophorus 

 tetradactylus ; so, knowing my want of the species, he 

 this year, 1886, very kindly made a special search for 

 it, the result being that, on the 20th of May, I had 

 the pleasure of receiving three specimens from him, 

 together with several healthy growing plants of the 

 thyme on which to feed them. 



The larva, when full-grown, is about half an inch 

 in length, and of ordinary Pterophorus shape, i. e. 

 plump, stoutest in the middle, attenuated at the 

 extremities, rounded above, flatter beneath ; the head 

 is small and glossy, considerably narrower than the 

 second segment ; a tuft of short hairs springs from 

 each tubercle. 



