BUTTERFLIES OF MONTANA. 



27 



Fig. 23. Neophasia menapia. 



Early Stages Described by Edwards. "The caterpillar infests the 

 pine trees and firs of the northern Pacific States. The larva lets itself 

 down by a silken thread, often a hundred feet in length, 

 and pupates on the ferns and shrubbery at the foot of 

 the trees. It sometimes works great damage to the pine 

 woods." 



Distribution It does not seem abundant in the west 

 end, but has often been seen in the Mission mountains 

 and about the laboratory at Big Fork high up in the 

 coniferous trees out of reach of the collector. At Swan 

 lake it was found rather abundant late in August, 1903. 

 In Auguist, 1904, about 40 were taken in a half hour, 

 about half way up the lake. The collecting region at 

 Swan lake for this species is along the lower half of the 

 . lake shore. Very few have been seen around the upper 



Neophasia menapia 



end. 



Genus PONTIA FABRICIUS. 



(The Whites). Fig. 23. 



Butterfly White, more or less marked with black, occasionally the 

 white is tinged with yellow. The outer margin of the primaries is 

 straight, the outer margin of the secondaries is more or less evenly 

 rounded. The egg is spindle shaped. The caterpillar is elongate, the 

 head hemispherical. The chrysalis is attached by the anal extremity, and 

 held in place by a silk girdle. 



Key to Species. 



1. Fore wings with a black bar at the end of the cell, and more or less 



of a black border, 2, 



Fore wings with no black bar at the end of the cell. 3. 



2. Markings on under side concentrated in brownish blotches, 



protodice. 



Markings on under side of hind wings green blotches on the disk, 



beckeri. 

 Markings on under side as rays on either side of the veins, 



occidentalism 

 Veins of fore wings black, spots smaller. sisymbri. 



