46 . Studies on Life-history of Bomhycine Moths. 



and vi, 179. He thinks there are six stages, and that it hibernates 

 in the 4th or 5th stage. 



Stage TI? — Length Y mm. Feeding on the ends and also eating 

 very ragged holes out of the side, so that the young brown larva 

 closely mimics the ragged portions projecting from the edge of the 

 hole ; the tail could be easily mistaken for one of the lower filaments of 

 the withered edge of the leaf. Head as wide as the body, with two 

 large rough finely tuberculated conical processes on the vertex ; they 

 are more conical than those in the next stage. There are two smaller 

 dorsal tubercles on the prothoracic segment, and a single large flat- 

 tened rounded one on the 3d thoracic segment. The body tapers 

 slowly from the 1st thoracic segment to the tail. The skin is rough, 

 with four transverse rows of fine granulations on each segment, 

 and the body is pale brown, like a withered leaf, while the tail, 

 which is now simple, straight, though spinulated, is scarcely twice 

 as long as the body is thick on the 5th abdoaiinal segment. 



Stage III. — July 14. Length 10 mm. The body and the pro- 

 portion of the tail and the shape of the tubercles as before, but the 

 body is darker than before, and the tail is now concolorous with the 

 body. This stage corresponds to the dark brown hibernation-stage 

 of the autumn brood of larvas. 



Stage IV. — July 18. Length 16 mm. In this stage the charac- 

 teristics of the last one are assumed, though the tail is still straight, 

 but with two paler long rings, the base and tip being darker. 

 The head narrows above and ends in two conical tubercles which 

 are not rough as before; it is dark in front, with a distinct Y-shaped 

 yellow clypeal spot. The body is brown, with a broad paler dorsal 

 stripe, which encloses the stout short tubercle on the 3d thoracic 

 segment, and contracts on the 3d and 4th abdominal segments. 

 There are two parallel oblique pale brown lateral stripes, the front 

 one beginning at the base of the 3d thoracic legs and extending 

 upwards and backwards to the hinder edge on the back of the 1st 

 abdominal segment; the second one of the same length and blend- 

 ing with the dorsal stripe on the back of the 3d abdominal segment. 



The last stage (length 22 mm.) was attained July 23d. It differs 

 from the preceding stage chiefly in the paler head, without the con- 

 spicuous yellow spot, and in the tail being swollen in the middle 

 and slightly at the end. 



Late summer' brood. — Several larvae were kindly sent me by Mr. 

 Tallant, from Columbus, Ohio, September 10; they were found 



