HIGH PRAIRIE 



291 



300 



Fig. 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, loc. cit., Fig. 12, p. 276). 



Fig. 301. — The life history of the golden-eyed lacewing (Chrysopa oculata): 

 o, eggs; b, the larva — "aphis-lion"; c, foot of the larva; d, the larva seizing an aphid; 

 e, the pupal cocoon; /, g, h, the adult; h, natural size (after Chittenden, Div. Ent., 

 U.S. Dept. Agr.). 



