LEAFHOPPERS OF MAINE. 



123 



Fig. 25. Deltocephalus coiifiguratus: a, Adult; b, face; c, vertex 

 and pironotum ; d, female genitalia ; e, male genitalia ; /, wing ; g, nymph. 

 All enlarged. (After Osborn and Ball.) 



The Destructive Leafhofper. 



Deltocephalus ininiicus Say. 



Jassus ininiicus Say. Jour. Acad. Nat Sci. Phila. VI, p. 305, (1831). 

 Deltocephalus inimicus Osborn and Ball. Pr. la. Acad. Sci. IV, 215 



(1897). 



This species which is so serious a pest in grasslands and occasionally 

 in wheat and oats in the south and west, especially in some parts of the 

 Mississippd valley is one of the common species in Maine but for the 

 past season it was not taken in such an abundance as to indicate as 

 great an economic importance as in some other localities. 



It is a small gray species with three pairs of round black dots, — 

 one pair on the head, another on the prothorax and a third on the 

 scutellum. The claval cells are reticulate with brown or blackish 

 squares. Length 5 -mm. 



The larvae of this species are quite distinctly marked after the first 

 moult. A black border passes from behind the eyes to near the tip of 



