INSECTS INJURIOUS TO THE HOP-PLANT. 283 



stripes across the back, and spots of the same color at the 

 base of the dorsal spines, which are yellow tipped with 

 black. The mature caterpillar is white, mottled, or 

 striped with gray or ashen, and with red spiracles. 

 (W. H. Edwards.) 



The butterflies of both species are of a rich brown color, 

 marked with black and tipped with lilac above, and of a 

 much darker purplish brown with the characteristic silver 

 spots beneath, which are well indicated in the illustration. 



Remedies. — Spra3dng with an arsenical will destroy the 

 larvae when such treatment becomes necessary. 



