HOW TO KNOW THE BUTTERFLIES 



each season up the coast to New England and up 

 the Mississippi Valley to Wisconsin. The chrys- 

 alis has a very peculiar form, being concave in 

 the back, and having the wing cases fan-shaped so 

 that it looks like a fading flower of the cassia 

 attached to the branch. The male butterfly has 

 a perfume which Miss Murtfeldt describes as 

 resembling that of violets. 



The Large Orange-sulphur 



Phccbis agarithe (Phce'bis a-gar'i-the) 



Plate XVI, Fig. 2 



This differs from the two preceding species, which it 

 resembles in size, in that the ground color of the wings is 

 orange. The figure on the plate represents the male ; the 

 female has generally golden orange, sometimes pinky-white, 

 fore wings with a diffused orange patch over the end of cell 

 R + M, and a brown spot at the end of this cell. Expanse 

 of wings two and one-half to two and three-fourths inches. 



This species is found in the southern portion of the Missis- 

 sippi Valley and southward. The larva feeds upon cassia. 



The Dog's-head 



Zerene acsonia (Ze-re'ne cas-so'ni-a) 



Plate XVII, Fig. 5, 6 



The wings are lemon-yellow above, bordered on the outer 

 margin with black. On the hind wings the border is narrow, 



90 



