HOW TO DETECT' OUTBREAKS OF INSECTS AND SAVE GRAIN. 9 



Fig. 5. — Stages and work of the true army worm {Cirphis unipuncta) and some of its 

 insect om^mles : a. Parent or moth : !», fuil-grown larva ; c, eggs ; d. pupa in soil ; e, 

 parasitic fly, Winthemia quadripuatulata, laying its eggs on an army worm ; /, a ground 

 beetle, Calosovia caliditm, preying upon an army worm, and, at right, Calosoma larva 

 emerging from burrow ; g, a digger wasp, ^phex sp., carrying an army worm to its 

 burrow ; h, Enicospilus purgatus, a wasplike parasite of the army worm. All about 

 natural size. 



98185°— Bull. 835—17 2 



