1236 THE BUTTERFLIES OF NEW ENGLAND. 



ing a numl)cr of bristles, generally widely forked at the tip. In the second 

 stage every trace of tubercles and bristles, forked or simple, has gone, ex- 

 cepting a few slight, spineless warts at the extremities, and in their place 

 fine, excessively short hairs are scattered over the body ; this has become 

 tumid on the thoracic segments, and is transversely striped with uniform 

 black and white or yellowish bands, of which there are many to a 

 segment. In the third stage the hairs are even less observable, and the 

 stripes have become finer and tremulous, while the incisure between the 

 last thoracic and first abdominal segment is marked by a broad, black, vel- 

 vety stripe, edged in front with white and behind with yellow. The fourth 

 stage shows no special change. In the fifth the broad, velvety stripe becomes 

 more conspicuous, because the oi-dinary stripes become more or less obso- 

 lete ; and when full grown the latter often or generally persist only as 

 transverse series of black dots on a nearly uniform green body, though the 

 yellow stripes remain, at least on the sides. 



In Jasoniades the infant caterpillar is cylindrical, slightly tumid ante- 

 riorly, of a dark brown or sometimes even velvety black color, a little 

 paler beneath, the extremities lighter, and an oblique stripe in the middle 

 above on each side, forming a sort of saddle-shaped, whitish mark ; the body 

 is covered with several series of wart-like tubercles, larger at the extremities 

 than in the middle of the body, beset with bristles. In the second stage 

 tubercles and bristles are gone, excepting at the extremities of the body, 

 where they are relatively much reduced ; the color and markings remain 

 much as before, but are perhaps more diversified, and have added to them 

 on the sides of many of the segments next the tubercles a minute bluish 

 spot, that of the third thoracic segment (now more distinctly tumid) with 

 a velvety black streak below it. In the third stage all the markings are 

 still more distinct and diversified, and the tubercles have almost entirely 

 disappeared and been replaced by smooth, shining lenticles, while on the 

 sides of the third thoracic segment the blue spot and black streak have 

 developed to a black aunulus with a blue centre. In the fourth stage the 

 general color becomes at first a dark brownish olivaceous, with the same 

 striking contrasts as before, but during the course of this stage this is re- 

 placed by a grayish green, and the saddle, which has been becoming yel- 

 low, fades and diminishes until a mere ghost remains ; the first abdominal 

 segment is edged behind with yellow, the lenticles have turned to colored 

 spots, and on the third thoracic segment is seen at first a pair of roseate 

 spots faintly edged with black, and a black line between them, afterwards 

 becoming a single yellow spot, including below a luteous lenticle, above a 

 velvety black streak, and in the middle a black-rimmed, turquoise spot. 

 In the final stage the caterpillar becomes pure green above, pale bluish 

 green below, and the only markings are a bright, transverse stripe of 

 black and yellow at the hind edge of the first abdominal segment, a few 



