2G BULLETIN UNIVERSITY OF MONTANA. 



FAMILY PIERIDAE. 



Small or medium sized; hind wings not tailed; white or yellow in 

 color; with dark marginal markings. Pierinae. 



SUB-FAMILY PIERINAE (The Sulphurs and Whites.) 

 Medium sized or small butterfly, white or yellow in color, with dark 

 marginal markings. In many genera the sub-costal vein of the fore wing 

 has five, or even six nervules, and the upper radial is lacking in this 

 wing. The eggs are spindle shaped, marked with vertical ridges and 

 cross lines. The caterpillars are cylindrical, generally green in color. 

 The chrysalids are generally more or less jointed at the head. 



Key to Genera. 



1. Antennae abruptly terminating in an ovoid club. 2. 



Abtennae terminating in an obconic club. 4. 



2. Abdomen shorter than the hind wings; color white or very pale 



yellow. 3. 



3. Underside of hind wings without marks, or marked along the veins; 



size, medium. Pontia, P. 27 



Underside of hind wings marked with a greenish net-work; small 



size. Synchloe, P. 22 



4. Hind wings with an orange discal spot, both wings with black border 



Eurymus, P. 37 

 Medium sized; costa black as far as the end of the cell; trans- 

 parent white wings; apex black with white spots. 



Neophasia, P. 2G 



Genus NEOPHASIA Behr. 



Butterfly — Medium size, white in color. The upper radial is lack- 

 ing, and the sub-costal is provided with five branches, the first emitted 

 well before the end of the cell. 



Early Stages — The egg is flask shaped. The caterpillar in its mature 

 form is about an inch long. The body is cylindrical, terminating in two 

 short anal tails. The color is dark green, with a broad white band on 

 each side. But one species is known. 



Key to Species. 



Almost a transparent white, a black border to fore wings, and a 

 black bar across the discal cell, meeting the border, menapia. 



THE PINE WHITE. 

 Neophasia menapia Felder. Figs. 22, 23. 

 Butterfly — Medium sized; hind wings white with dark veins on the 

 under side; black and white apex. 



