INSECTS INJURIOUS TO THE GRAINS AND (UlASSES. 63 



nent region. Although the eggs for a second brood are 

 sometimes laid, these seldom come to maturity, and the 

 species is essentially single-brooded. 



Emmies. — As before mentioned, large numbers of the 

 nymphs are destroyed before reaching maturity by their 

 natural enemies. Among these a minute fungus un- 

 doubtedly kills many of those already somewhat exhausted, 

 especially during damp weather. Almost all of our com- 



FiG. 35. — Antliomyia, egg-parasite, o, fly; h, puparium; c, larva; 

 d, head of larva. (After Riley.) 



mon birds, as well as many of the smaller mammals, are 

 known to feed quite largely upon them. 



A small red mite {TromhicUum locustanun Riley), some- 

 what resembling the common Red Spider infesting green- 

 houses, is often of great value not only in killing the 

 nymjihs by great numbers of them sucking out the life- 

 juices of the young hopper, but also in greedily feeding 

 upon the eggs. 



The maggots of several species of Tachina-flies are of 

 considerable value in parasitizing both nymphs and adult 

 locusts. Their eggs are laid on the neck of a locust, and, 



