PAPILIONIDiE. 



255 



The duration of the pupa stage was ten or eleven days." The 

 pupa, received from Mr. Saunders, has two large, conical tuber- 

 cles in front of the insertion of the antennae, and two acute 

 tubercles on the pro- 

 thorax. The thorax is 

 acutely bituberculated 

 on the sides, with an 

 acute thin dorsal ridge, 

 on each side of which 

 are two small, sharp 

 tubercles. Along the 

 back of the abdomen Fig. 184. 



are two rows of tubercles, those on the third abdominal ring 

 being much larger. It is half an inch long, and pale ash, 

 "with black dots and irregular lines. 



Melitoea differs in not having silver spots beneath, while the 



caterpillars are covered with 

 blunt tubercles which give rise 

 to short stiff bristles. They 

 feed on different species of 

 plantain. The chiysalids are 

 like those of Arg^^nnis, but spotted with black or brown, and 

 not with golden. 



WIeliUtia Phaeton Drury (Fig. 184) is found in damp bogs. 

 We have taken the j'oung larva less than one-half of an inch 

 long, early in spring under leaves, where it had 

 doubtless hibernated. The mature larva (Fig. 

 185, enlarged, the specimen from which the 

 drawing was made, is too contracted, the head 

 being drawn in unnaturally ; fig. 186, pupa) is 

 c^^lindrical, and the head is slightly angulated. 

 There are nine rows of black spines which are 

 fleshy and surrounded at the tips with rather 

 long, thickset spinules. The head and thoracic 

 and last three abdominal rings are black ; the rest 

 of the body being deep orange, with black lines between the 

 spines, and dots along the side. Towards the last of Ma}^ and 

 early in June it changes to a clnysalis, which is white with a 

 slight bluish tinge, with yellow papillae, and scattered black 



Fig. 186. 



