Alfalfa in Kansas. 



381 



coming of spring the worms resume their feeding, and, attaining full 

 growth, pupate in the soil. (Fig. 327.) The moths emerging from these 

 pupae lay their eggs during May behind the sheaths of the grass, fasten- 

 ing them to the leaf by means of a gummy cement. (Fig. 328.) The 

 worms hatching from these eggs reach maturity within a few weeks, 

 pupate, and transform into the second brood of moths in the latter part 

 of June. A third brood of moths appears in August and September. 

 This brood lays the eggs from which the larvae that, after becoming 

 partly grown, pass the winter in the soil. 



Fia. 327. Army worm. Larvse, pupae and moths; 

 about % natural size. Eggs greatly enlarged. (After 

 Forbes.) 



Methods of Control. 



NATURAL ENEMIES. Fortunately, parasitic and predaceous foes at- 

 tack the army worms to such an extent that they are seldom seriously 

 abundant in the same locality two years in succession. Large numbers 

 are destroyed by predaceous ground beetles and their larvae, but the 

 most deadly enemies attacking them are the tachina flies. (Fig. 329.) 

 These parasitic flies lay a dozen or more eggs on the worms, usually 



