l62 



ECONOMIC ENTOMOLOGY 



or the bases of the stems of wheat and grasses. Eggs hatch in 2 or 3 

 weeks or less. The nymphs reach maturity in 6 or 7 weeks, when a 

 migration occurs on foot to other plants. Eggs are laid on the stems 

 and leaves of corn and the nymphs attain maturity in autumn. There 

 are, therefore, two broods in a year. 



Pig. 10^. 



-Chinch bug: adults of short-winged form. 

 Webster.) 



Much enlarged. (After 



Control. — Clean up rubbish and burn the dried grasses in which the 

 pest winters in late fall or early spring; place barriers of dust or oil or 

 tar lines; plow furrow about fields to be protected; the use of muscardine 

 fungus. 



Fig. 106. — The chinch bug: a, h, eggs; c, newly hatched larva, or nymph; 

 d, its tarsus; e, larva after first molt; /, same, after second molt; g, last-stage larva; 

 the natural sizes indicated at sides; h, enlarged leg of perfect bug; j, tarsus of same, 

 still more enlarged; i, proboscis, or beak, enlarged. {From Riley.) 



Parasites and Enemies. — Triphleps insidiosus Say, Milyas cinctus 

 Fab., Agonoderus pallipes Fab., coccinellids, Reduviolus ferus, Pagasa 

 fusca, Blechrus, Chrysopa, quail, frog, Sporotrichum globuliferum Speg. 



