﻿[Pec.i895. Packard. Some Bombycine Caterimi.laks. ITT 



Larva, Stage /.—The larva.> when first hatched were ahnost un- 

 distinguishable from those of Spilosoina con^n/a, which hatched at the 

 same date. The head is wider than the body, which is quite hairy and 

 white. The head is pale amber with two brown spots on each side, or 

 rather, nearly all are pile horn-brown. The tubercles all bear but a 

 single hair, and are as long as the body is thick. It molted July ii. 



Stage II. — Length at first 4 mm. Now the body is of the same 

 general shape as before, but the head is black and the tubercles are 

 black. The prothoracic plate is divided, and the other dorsal and 

 lateral tubercles give rise to from five to six short black hairs, with some 

 white ones. 



Stage III. — (Described July 21-22). Length 7 mm. Body 

 whitish with black tubercles and hairs much as before. There are now 

 two faint straw yellow broad lateral bands extending down to the base 

 of the abdominal legs. Also a double row of subdorsal dark brown 

 spots on each side of the back, at the sutures, the central part of each 

 segment being clear of markings. 



August 14. The body is now 12 mm. in length, and above is much 

 blacker; the straw yellow band on the side being now very conspicuous. 

 The tubercles are dark metallic blue, and there are four dorsal black 

 bands on a livid ground. It molted August 14. 



Stage IV. — Length 12 mm. The body is now entirely black, with 

 metallic blue tubercles; the hairs are of unequal length and black. 

 There is a lateral row of straw yellow spots, the continuous band of the 

 previous stage being broken in the middle of each segment. It is now 

 a very handsome caterpillar. It molted September i . 



Stage V. — Length 14 mm. It has the same markings as in the 

 previous stage, and the only difference is a slight increase in size. 



Stage VI. — It molted again September 12-15, but presented no dif- 

 ference either in markings or size. 



Spilosoma congrua. 



The eggs were received from Mr. Dearden June 27. The larva 

 had in part hatched and were hatching June 30. 



Larva, Stage I. — Body at first white except two dark spots on the 

 head, but in a few minutes the latter became dark. Head wider than the 

 body. The setiferous chitinous plates or flattened tubercles dusky and 

 contrasting with the white body. Prothoracic plate divided. Under a 

 Y-z inch objective the dorsal and lateral tubercles of the abdominal seg- 

 ments bear but a single hair, which is finely spinulate, and as long as 

 the body is thick. 



