124 



MAINE AGRICULTURAL EXPERIMENT STATION, 



1915- 



the abdomen, the rest of the body being light yellow or whitish. There 

 are for more southern localities and probably for Maine at least two 

 distinct broods each summer and winter is passed in the egg stage. 



Fig. 26. The inimical leafhopper (Deltocephalits inimicusj: a, Adult; 

 b, face ; c, vertex and pronotum ; d, female genitalia ; e, male genitalia ; 

 /, elytron: g, nymph. All enlarged. (After Osborn and Ball.) 



Eggs hatch in early spring and the young of the first generation reach 

 their maturity the later part of June, and the eggs deposited by adults 

 of this generation hatch in a short time and the young develop during 

 mid-summer and reach maturity by August or early September. Their 

 development is irregular enough so that considerable numbers of nymphs 

 and adults may be found at any time during the summer and early 

 autumn but ordinarily adults are only found in late fall or early winter 

 and it appears quite certain all deposited eggs before winter and that 

 the winter is passed then in the egg stage. How far this life cycle will 

 applj' to the condition in Maine it is somewhat difficult to say but from 

 the abundance of well developed nymphs and adults in late August and 

 early September it seems probable that the two generations are produced 

 about as in the latitude of Iowa and New York. 



The range of food plants in this species is considerable but it seems 

 to favor blue grass as its first choice of food plant and the distribution 

 of the species is apparently quite in agreement with the distribution 



