Explanation of Plates. 395 



Plate XXXIII. 



Fig. 1. Chionaspis o.mericaAia n. s., on elm leaf and 

 twig, showing both male and female scales. 



Plate XXXIY. 



Fig. 1. CMonasins americana n. s.: a, adult male, per- 

 fect form; h, antenna; c, tarsus. 

 Fig. 2. Adult male of same, stub-winged form. 

 Fig. 3. Young larva of same species. 

 Fig. 4. Adult female of same species. 

 Fig. 5. Last segment of same. 



