THE CHRYSALIS. 43 



have the front extremity prolonged in the middle 

 [FigS. 55, 56 ; see also Fig. 52], while 

 the sides of the head are quite smooth 

 and regular ; others again have the 

 same smooth and bluntly rounded 

 head [Fig. 57] which generally char- 

 acterizes the pupa of moths. Since 

 these projections are mere extensions Mop *> nat - 8ize< 

 of the pellicle and quite hollow, it might be pre- 

 sumed that they indicated some variation in the 

 _^ ~ ^ e ^ kh e cnr y sa lis ; an( i such in- 

 v5? deed is the fact. Many chrysalids 



ii8 F Sr Heodes C H7 P S o-~ are protected by some sort of a 

 phiaeas, nat. size. cocoon ; and these have perfectly 

 smooth and rounded heads ; so, too, have those 

 which, though exposed, are girt immovably to the 



Fia 59 Chrysalis of Laertias Philenor, nat. size; a, dorsal view; b, side 

 view. (After Harris.) 



object they have chosen as their support [Fig. 58]. 

 Other chrysalids are attached by the tail and 



