552 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Rothschildia jorulla. 

 (Attacus cinctus.') 



Larva. — Beginning of Stage II. It was hatched in New York from 

 a few eggs laid by examples bred from the cocoon and mated by Mr. 

 Joutel, and sent me May 8, and described May 9. Length 7 mm. Body 

 unusually short and thick, aud now much wider than the bead, which is 

 of the usual shape (as in Telea and Philosamia), smooth, with long scat- 

 tering irregular hairs ; antennae white ; it is black and yellowish-white, 

 the sides black, with a black V on each side of the yellow clypeus- 

 posterior ; cl ypeus-anterior with a whitish transverse line. 



Body and legs dull livid brownish. The tubercles are very large and 

 crowded together ; they are full, globular-conical, aud a little higher 

 than thick, and all pale straw-yellow. 



There are four dorsal prothoracic tubercles, but the two on each side 

 are united at base, making a large double transverse tubercle higher than 

 any of those behind, aud all four conuected by a ridge; yet they are 

 shorter than in Stage I. 



All of the tubercles behind the prothoracic segment are of the same 

 size and height, the meso- and the metathoracic ones not differing from 

 each other, nor are the abdominal ones smaller than those on the 

 thoracic segments, nor do they differ in height or size among themselves, 

 except the median tubercle on the 8th abdominal segment, which is 

 quite broad and one-fourth larger and higher than the others, aud about 

 twice as wide as the others ; there are 6-7 setae on each side. Those 

 on the sides of all the segments are of the same size. 



The dorsal tubercles are each armed with eight stiff setae, which are 

 pale brown, the longer ones of which are about a third longer than the 

 tubercle itself, one being in the centre and the others arranged around it. 



On May 17, after being forced by a sojourn in the kitchen, it was 

 ready to moult; its length was 13 mm. The body had now become 

 livid greenish-yellow ; the tubercles all straw-yellow, and of the same 

 proportions. The spiracles are dark, rather conspicuous. There is a 

 transverse blackish line on the prothorax behind the four tubercles. 



Stage III. It moulted May 18, and was described on the 19th. Length 

 20 mm. Head yellow, black behind, with a broad V in front connect- 

 ing with the black base of the clypeus anterior. Body thick, head only 

 one-half as wide as the body in the middle. First thoracic considerably 

 narrower thau the 2d thoracic segment. The tubercles are still all 

 similar, of the same size and color. The two dorsal ones on each side 



