400 



PSYCHE. 



[Aug-uKt — October 1S90. 



tive lines and marking's of the last stage 

 are now indicated. It is also probably 

 the rule among the bombyces, judging 

 by many cases I have observed, that by 

 the 3d stage the larva now large and 

 living more conspicuously, assumes the 

 general shape and coloration of the fully 

 fed cateipillar. 



The life-history of Ainpelophaga 

 my roil {Cramer) . 



Two of the larval stages have been 

 described by Lintner (Proc. Ent. vSoc. 

 Phil. V. 3) the length of his youngest 

 larva being .50 inch ; the other stage 

 being the final one. Riley (2d Mis- 

 souri Rept. 71-73) has briefly described 

 the egg, the first and last stages. I am 

 also indebted to Mr. James Angus for 

 the eggs of this sphingid which were 

 sent from New York at the entl of June. 

 The larvae were hatched 2 July 1S90, 

 and fed on Ampelopsis leaves. 



Egg. — Rounded oval. Length 2.J 

 mm. The shell, under a Tolles triplet 

 is smooth. It is of the same shape, 

 size and appearance as that of Dcida- 

 1)1 ia inscripta. 



Stage I. — Hatched 2 July. Length 

 t; mm. The larva in this stage, espec- 

 ially at the time of hatching is not only 

 seen to be similar to that of Dcidaniia 

 inscripta., but is under a high power 

 Tolles lens not even distinguishable 

 from it, unless the caudal horn be 

 slightly shorter and less hirsute in the 

 present species. The head is at first 

 larger and broader than the body, and 

 of the same color. Prothoracic seg- 

 ment with a dorsal crescentic shield or 



flat surface. The caudal horn is long, 

 black and when observed under a high 

 power Tolles triplet, hirsute. The legs 

 are concolorous with the body. Behind 

 the base of the caudal horn both in this 

 and D. inscripta., is a deep orange-red 

 discoloration or transverse streak. The 

 body is now wrinkled transversely 

 above. The hairs are glandular, and 

 slightly bulbous at the end. 



Three days later, after feeding, and 

 compared with larvae of D. inscripta 

 of the same period the body seems to be 

 in A. myroi a little slenderer, and it 

 also diflers in the sutures being slightly 

 yellowish, while the head is of a paler 

 greenish tint. The glandular hairs are 

 of about the same length as those of /?. 

 inscripta., but perhaps the tubercles are 

 more prominent. 



Stage II. — Moulted 9 July. At first 

 the caudal horn is flesh-colored, after- 

 wards turning dark. By 1 1 July it had 

 grown to the length of 10 mm. And 

 now the caterpillar is quite diflerent 

 from that of D. inscripta of the same 

 stage. The body is very slender, the 

 head slightly wider than the body. 

 Each segment has eight wrinkles or 

 folds of the skin which is also spotted 

 with white raised dots. The sutures 

 are yellowish green, contrasting with 

 the body. The caudal horn is pale 

 reddish-chestnut, becoming darker at 

 the extreme tip, which is slightly but 

 distinctly divided at the end, each lobe 

 bearing a bristle. There are as yet no 

 lines or oblique stripes visible. 



Stage III? Length 17 mm. iS July, it 

 had probablv moulted, but I did not see 



