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A 



c 



PLATE 69. A. Two bugs (Prionotus cristatus on the left and Euchistus servus on the right) 

 whose odor and flavor are disagreeable to insect-eating birds, lizards, toads, and frogs, and whose 

 shape is easily recognized, causing them to be avoided. B. Lady beetles (Hippodamia convergens, 

 Megilla maculata, Adalia bipunctata}. By the courtesy of the United States Department of Agri- 

 culture. C. Colorado potato beetle (Doryphnra decemlineata); a, eggs; b, larva; c, adult. By 

 the courtesy of the United States Department of Agriculture. 



