INSECTS ATTACKING CORN. 21 



pigeon grass or smart-weed maturing in the corn would diminish 

 likewise the chances of survival of young root-lice the following 

 year." 



Kansas Notes. This insect has not been very generally ob- 

 served in the State, but it is undoubtedly more common than 

 indicated by the lack of observations. 



CORN-LOUSE. 

 (Aphis maidis Fitch; Order, Hemiptera.) 



Diagnosis. Many minute soft, green insects on the stalks, 

 leaves, or tassels; small brown ants running up and down the 

 stalks ; wilting of the corn leaves. 



Description and Life-history. Very small, soft-bodied, apple- 

 green insects; body elliptical or slightly ovate in outline. The 



FIG. 11. CORN-LOUSE; a, winged female; &, pupa; c, wingless female. 



insects are mostly wingless, though in the late fall winged speci 

 mens may be found. The eggs are laid in the fall and hatch the 

 following spring. 



Remedies. There are so many natural enemies of the plant- 

 lice that they are rarely permitted to do serious damage, despite 

 their extraordinary prolificness. Several species of lady-beetles 

 feed on the Corn-louse. The lice could be easily destroyed by the 

 use of kerosene emulsion (see p. 9), but this would be imprac- 

 ticable as a general remedy in fields. 



Kansas Notes. Prof. E. A. Popenoe found this insect attack- 

 ing cane in southern Kansas in 1882. 



A correspondent in Brown county wrote this Department un- 

 der date of June 2, 1891, sending specimens of the louse and re- 



