HIGH PRAIRIE 291 
Fic. 299.—A parasitic wasp depositing 
eggs in the body of a grain louse (after 
Washburn, Bull. 108, Fig. 16, p. 274). 
FIG. 300.—A louse killed by a parasite 
(after Washburn, Joc. cit., Fig. 12, p. 276). 
Fic. 301.—The life history of the golden-eyed lacewing (Chrysopa oculata): 
a, eggs; 6, the larva—“aphis-lion”’; c, foot of the larva; d, the larva seizing an aphid; 
e, the pupal cocoon; f, g, k, the adult; %, natural size (after Chittenden, Div. Ent., 
U.S. Dept. Agr.). 
