14 



BULLETIN UNIVERSITY OF MONTANA. 



is white, but resemble them In possessing similar scent organs In the 

 larval state. They are found only on high mountains or far north. 



Key to Genera. 

 Medium size, diaphanous wmgs, white or yellow In color, marked with 

 black spots and round pink or yellow spots margined with black. 



Parnasslus. 

 Genus PARNASSIUS, Latrielle. 

 Butterfly — Medium size, with diaphanous wings, generally white or 

 yellow in color marked with black spots, and round pink or yellow spots. 

 The head is relatively small, thickly clothed with hairs. The antennae 

 are short and straight. The wings have a rounded apex. The upper 

 radial is lacking. 



Early Stages — The egg is turban-shaped. The caterpillars have very 

 small heads. They are flattened and dark brown or black in color with 

 light spots. 



Key to Species. 

 Males with very light wings, black reduced to a row of marginal and sub- 

 marginal lunules, the latter often lacking. Females with the whole 

 upper surface of primarus smoky black. Antennae with black and 

 white rings, black knobs. smlntheus. 



Males with darker wings, a sub-marginal row of white lunules. Females 

 much like males ,but darker. Antennae black . clodius 



THE PARNASSIUS BUTTERFLY. 



Parnassius Smintheus, Dbl. and Hew., van Hermodour. Fig. 13, Male; 



Fig. 14, Female. 



Fig. 13, Parnassius smintheus, var. hermodour, male. 



Butterfly — This beautiful insect Is subject to great variations. The 

 expanse of the wings of the female is 2.25-3.00 in., male 2.00-2.50 in. 

 The white ground is marked with smoky black to a greater or less ex- 

 tent. On the wings are yellow or pink spots, varying in size, margined 



