208 



PSYCHE. 



[May . 



appeared, together with their bristles, 

 and so have the bristles of the other 

 warts, but in these latter instances the 

 warts remain, and have become short, 

 fleshy, often brightly colored filaments ; 

 while to take the place of the simpler 

 warts a new and independent series of 

 fleshy filaments has arisen between 

 the two series which disappeared. 

 The remaining stages are much the 

 same as this, only the filaments at the 

 extremities of the body grow longer 

 and longer with each stage, more and 

 more highly colored ; a suprastigmatal 

 series of coral red spots is introduced in 

 the fourth stage on some of the abdomi- 

 nal segments ; and finally, in the last two 

 stages, the thoracic segments taper for- 

 wards markedly. 



The new-born Iphiclides ajax (Fig. 

 3) is cylindrical, but a little larger in 

 front than behind, of a nearly uniform 

 dark leaden color, darker, however, on 

 the front half than behind, covered with 

 rounded warts arranged in several rows, 

 a few at the extremities slightly larger 

 than the others, most of them support- 

 ing a number of bristles, generally 

 widely forked at the tip. In the sec- 

 ond stage every trace of tubercles and 

 bristles, forked or simple, has gone, 

 excepting a few slight, spineless warts 

 at the extremities, and in their place 

 fine, excessively short hairs are scat- 

 tered 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 ob- 



servable, and the stripes have become 

 finer and tremulous, while the incisure 

 between the last thoracic and first ab- 

 dominal segment is marked by a broad, 

 black, velvety 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, be- 

 cause the ordinary stripes become more 

 or less obsolete ; and when full grown 

 the latter often or generally persist only 

 as transveise series of black dots on a 

 nearl}' uniform green body, though the 

 yellow stripes remain, at least on the 

 sides. 



In Jdsoniades glaiicus (Fig. 3) the 

 infant caterpillar is cylindrical, slightly 

 tumid anteriorly, of a dark brown or 

 sometimes even velvety black color, a 

 little paler beneath, the extremities light- 

 er, 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, except- 

 ing at the e.xtremities of the body, where 

 they are relatively much reduced ; the 

 color and markings remain much as 

 before, but are perhaps more diversi- 

 fied, and have added to them on the 

 sides of many of the segments ne.xt 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 



