PLATE IV. 
3, U. S. Dept. of Agriculture. 
22 
1 
Bul. 
EUROPEAN ELM SCALE 
in elm (X 10). 
(Doten.) 
k 
B, Larve and male cocoons in early spring (X 16). 
aled in crac 
y conce 
artl 
p 
in winter 
Larvee 
A, 
