64 



THE MONTHLY BULLETIN. 



Life History. — The life history of this louse is very imperfectly 

 known, several stages being entirely unobserved. In the early summer 

 the lice appear in great -numbers upon the young ears, leaves and tas- 

 sels of the corn stalks and continue to breed and feed there until 

 the foliage begins to dry and the corn to ripen. Where they go, upon 

 what they feed afterwards and how they pass the winter are unknown. 

 Due to the fact that this louse does little direct injury, no extended 

 studv has been made. 



Pig. 52. — The corn leaf-aphis (Aphis maidis Fitch). A and B, adult lice; 1, third 

 antennal article of winged louse ; 2 and 3, fourth antennal articles of winged louse ; 

 .5 and 6, cornicles of winged and apterous females ; 7 and 8, antennae of apterous 

 and winged lice. (Bssig, P. C. Jr. Ent. ) 



Distribution. — This aphid is well distributed throughout the entire 

 State and may be found in almost every growing cornfield. 



Food Plants. — The known food plants of this louse are corn, 

 sorghum and occasionally barlej'. 



