141 



BULLETIN UNIVERSITY OF MONTANA. 



THE SILVER-SPOTTED SKIPPER, Epargyreus tityrus, Fabricius. 



Fig. 103. 



Fig. 103. Epargyreus tityrus, upper (left) and lower (right) surfaces. 



Butterfly — Expanse, 1.75 to 2.00 inches, 43 to 50 mm. Upper surface 

 dark brown. The fore wings are crossed by an oblique yellow band of 

 four large, spots, from the middle of the costa to near the posterior 

 angle, where it ends in a rounded spot. Beyond there is a narrow spot 

 in the first median interspace extending from vein to vein. Fringes gray 

 and brown at the edge of veins. Underside aboue the same, but this 

 hind wings have a conspicuous silvery white band in the middle, nearly 

 reaching the cosa; palpi brown, slightly yellowish beneath. 



Early Stages — The egg is nearly globular, flattened at the base, with 

 fifteen ridges from the base to apex. Color white, with a bright red 

 spot at apex. The young larva is orange; head short, a few scattered 

 over the body. It feeds upon the common locust, rose, acacia, wistaria, 

 and a species of wild bean. 



Distribution — It is found quite generally over the entire United 

 States, more abundantly eastward. In Montana it has been taken by 

 Wiley at Miles City, by Brandegee near Helena, and by Elrod at Flat- 

 head lake. 



Genus COCCEIUS. 

 THE NORTHERN DUSKY-WING, Cocceius pylades, Scudder. 



Fig. 103A. Cocceius pylades, slightly reduced. 



