44 



THE CHRYSALIS. 



FIG. 60. Chrysalis of Eu- 

 phoeades Troilus, nat. size. 



loosely bound about tlie middle by a girth which 

 allows the body to sway from side to side [Figs. 59, 

 60] ; while still others hang freely by their hinder 

 extremity. In these two latter 

 cases the chrysalids may be 

 blown hither and thither by 

 every breeze and are liable to 

 injury from neighboring ob- 

 jects ; their point of greatest 

 motion is of course the head, 

 and this, therefore, is guard- 

 ed by projecting roughnesses. 

 In those which hang freely 

 there are some exceptions to this rule, as in the 

 case of our Milk- weed butterfly [Fig. 61], but 

 even here little conical tubercles may be dis- 

 covered ; and, besides, the chrys- 

 alis stage of this species is passed 

 in midsummer, and therefore is 

 very brief. So far as I am 

 aware, every chrysalis w?tich 

 lives through the winter, and 

 whose body hangs at the mercy 

 of the wind, has its head pro- 

 tected as I have described ; 

 those which hang freely have al- 

 ways the two frontal projections ; those which 

 are also loosely girt about the middle sometimes 

 have the same ; or they may have the single ex- 



Pro. 61. Chrysalis of 

 Danai* Plexippus, nat. 

 size (Riley). 



