^12 



KE7 TO TUB GROUPS— CATERPILLAR. 49 



E\ Segments of body highest next front edge, or 

 with the front sloj^e the more abrupt. 

 Head not capable of special extension . 

 i\ Body flattened, covered with short hairs 

 uniformly distributed. 30. Cliryso- 

 2)]ianus. 31. Eindemia. 32. Heocles. 



r. Body hardly flattened, covered with long 

 hairs arranged in transverse masses. 



33. Feniseca, 

 . Body cylindrical or enlarged in front, with head of 



ordinary size. 



(Family Typical Butterflies.) 

 D\ Back of head descending from summit ; body 



with numerous papillae and no scent- 

 organs (Subfamily Pierids.) 



W, Papilla (supporting hairs) nearly equal in 

 size, or if not, the larger ones are 

 numerous and distinctly arranged 

 in transverse and not longitudinal 

 series on the abdominal segments. 

 (Tribe Yellows or Red -Horns.) 

 f. No anterior process on first thoracic seg- 

 ment, above. 

 g\ Papillae (supporting hairs) elevated, dis- 

 tinctly higher than broad. 

 h\ Papillae of two sizes, the larger ar- 

 ranged in definite transverse rows. 



34. CalUdri/as. 

 h'. Papillse of nearly uniform size with no 

 definite transverse arrangement. 

 i\ Largest papillse on head larger than 



largest ocelli 37. Xanthidia. 



i'. Largest papillse on head smaller than 

 largest ocelli 38. Eurema, 



