THE CATERPILLAR. 



each segment, and all the spines of one row will 

 be found on corresponding 

 points of the different seg- 

 ments, either at the front, 

 or back, or centre, as the case 

 may be. The first thoracic 

 segment, however, takes lit- 

 tle part in these regular se- 

 ries ; its appendages are usu- 

 ally reduced to a transverse 

 series next the front edge, 

 often forming a sort of crown 

 to the head ; still they may 

 severally be proved to form 

 part of the longitudinal series 

 of the rest of the body, or 

 rather of the thoracic seg- 

 ments ; for with scarcely an 

 exception among the cater- 

 pillars of butter- 

 flies, those series 

 which extend 

 along the ab- 

 dominal seg- 

 ments either 

 stop altogether 

 at the thoracic 

 segments, or 

 slightly change their direction at this point ; so 



FIG. 28. Caterpillar of Laer- 

 tias Philenor, nat. size ^Riley). 



FIG. 29. Caterpillar of Basilarchia Archippus, 

 nat. size (Riley). 



