68 INSECTS INJURIOUS IN 1902. 
Fig. 59.—Woolly aphis (Schizoneura lanigera Hausm.)—(a) agamic female; 
(b) larval louse; (c) pupa; (d) wimged female with antenna enlarged 
above; all greatly enlarged and with waxy excretion removed. 
After Marlatt, Division of Entomology, 
Dept. of Agriculture. 
Fig. 60.—Woolly aphis.—(a) root of young tree illustrating deformation ; (b) 
section of root with aphides clustered over it; (c) root louse, female; 
(a and b) natural size; (c) much enlarged. After Marlatt, 
Division of Entomology, Dep. of Agriculture. 
b 
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