LEAFHOPPERS OF MAINE. 



121 



Deltocephalus debilis Uhler. 



Deltocephalus debilis Uhler. U. S. Geol. and Geog. Sur. Bui. 



Light grass green above, below darker, especially the frontal arcs, 

 but without the solid black of abdominalis which it approaches very 

 closely in many characters. Length 4 to 4.5 mm. 



Specimens referred here were taken at Orono, August 5, 1913. 



Deltocepltalus abdominalis Fab. 



Deltocephalus abdominalis Fab. Syst. Rhyng, p. 98, 61. 



A rather large grass green species with the upper part of the face 

 intensely black, the lower central part light yellow, the abdomen black, 

 except margins of segments and sides of ovipositor. Much like debilis 

 but slightly larger and distinguished by the black color on the face and 

 underside of abdomen. Length 5 mm. 



This species occurring in northern Europe and America is a common 

 species ailong our northern border and in Maine iS'peoimens have been 

 taken at Houlton Aug. 24th, Fort Fairfield Aug. 25th, and Fort Kent 

 Aug. 28th, as it feeds in grass and wheat and occasionally appears in 

 large numbers it must be counted injurious. 



Fig. 24. Deltocephalus affinis: a. Adult; b, face: c, vertex and pro- 

 notum; d, female genitalia; e, male genitalia; /, wing; g, nymph. All 

 enlarged. (After Osborn and Ball.) 



