50 2 HE COMMONER BUTTERFLIES. 



g^ Papillae (supporting hairs) mere raised 

 points, not distinctly higher than 

 broad. 

 h\ A shining lenticle just above the spir- 

 acle-line on second and third tho- 

 racic segments 35. Zerene. 



h^ No shining lenticle just above the spir- 

 acle-line 36. Eurymus. 



r. A pair of anterior processes on first thoracic 



segment above 39. Nathalis. 



E'. Papillae (supporting hairs) of unequal size, 

 the larger arranged in longitudinal 

 as well as sometimes in transverse 

 series on the abdominal segments. 

 F'. Body slender ; head much broader than 

 high. 



(Tr. Orange Tips.) 40. Antliocliaris. 



F*. Body less slender ; head scarcely or not 



broader than high . . (Tribe Whites.) 



g\ Larger hair- bearing papillae broader than 



high 41. Pontia. 



g^ Larger hair-bearing papillae higher than 



broad 42. Pieris. 



D^ Back of head with no descent from summit; 



body almost naked, with exceedingly 

 few papillae and with scent-organs 

 which can be thrust out of the seg- 

 ment behind the head. 



(Subfamily Swallow-Tails.) 

 e\ Body with long fleshy filaments on the sides. 



43. Laertias. 

 e\ Body with no permanent fleshy filaments. 

 i\ Hinder thoracic segments noticeably larger 

 than the next succeeding segments. 



