1893.] loo [rackard. 



and about one-third as long as the body is thick. The thoracic and ab- 

 dominal legs are slate-gray, of the same color as the body. 



Life History of Heteropach.\ rileyana (Harvey). 



Tills caterpillar has been reared from the honey locust ( Oleditschia 

 triacanthos) by Mr. Pilate (Papilio, ii, 67), while Prof. G. H. French 

 writes that he has also fouiid it on that plant. In response to my request, 

 Mr. W. N. Tailaut, of Columbus, O., sent me early in August several 

 young larvfe, at Brunswick, Me., where its food plant flourishes ; and a 

 year later he kindly sent me the eggs and larvie of this interesting fi)rm. 

 Regarding its habits he writes me as follows : "Eggs deposited May 15. 

 We have two and probably three broods per year. Eggs generally laid 

 in a cluster or in a row or rows of twenty lo forty. In contineuient they 

 will be deposited on the leaves or branches, but in nature I think they are 

 always deposited on the bark, at least I have never found them on the 

 leaves." The eggs hatched during May 35 and 26, not all simultaneously, 

 and the description was made from the freshly hatched individuals, those 

 which had been out of the shell for about half a day not diftering from 

 one I saw creeping out of the egg. 



£!gg. — Length, 1.5 mm. Cylindrical, though but slightly longer than 

 broad. The shell is of a peculiar bluish white, the surface not highly 

 polished, and under a Tolles triplet (about 13-15 diameters) it is not seen 

 to be pitted, but under a half-inch objective, small, faintly marked hex- 

 agonal areas can be seen which are quite irregular in shape and with a 

 thickened or raised central area. The surface of the shell is of a peculiar 

 porcelain te.xture and bluish white, with short, broad, curved, darker blue 

 streaks. 



Larva, Stage I. — Just hatched. Length, 3 mm. The head is large and 

 about one-third wider than the middle of the body ; it is broad, being a 

 little wider in front of the middle than behind. It is of a pale horn color, 

 with a broad dark median band extending from beliind and ending at the 

 apex of the clypeus, where it spreads out somewhat, stopping at the 

 transverse pale band crossing the head, and which dilates at the end on 

 each side of the head. On each side of the dark band is a parallel pale 

 band which passes down to the middle of the front, and then curves out- 

 ward at a right angle, dilating at the end. 



The side of the head is blackish, or rather the white portion leaves a 

 large, much curved black band. The head is clothed with long, rather 

 thick blackish and gray hairs. 



The body gradually tapers backwards from the broad prothoracic seg- 

 ment which flares outward and upward in front. The segment is pale 

 horn color above, rather naked. On each side is a piliferous tubercle, 

 which is slightly larger than those on the succeeding segments, but not 

 so well developed and prominent as usual in the group ; at first pale, it 

 afterwards turns darker, and it bears mixed dark and gray hairs, more 



