69 



rupted at the middle of the vertex, followed by a second heavier 

 line sometimes interrupted and sometimes not, the two being nearly 

 joined by a bar at the ends of the first. 



Face much as in nigrifrons, but yellow, with a median black 

 stripe, and black transverse lines interrupted in the middle. Cheeks 

 with less black than in the other species. Pronotum about as in 

 nigrifrons, but the dark tint extending farther forward, leaving only 

 a narrow margin of definite yellow, which is sometimes blotched 

 with black in front. Scutellum with black impressed line much 

 broader, usually somewhat lobed posteriorly, and with two round 

 black dots in front of it upon the middle of the scutellum. The 

 black of the mesonotum extends farther back than in the other 

 species, reaching sometimes to the middle of the scutellum, which is 

 then marked in front by an irregular band of black, sending two 

 Targe triangular processes backwards, with a smaller process between 

 them. 



Coxae green. Upper margins of the thoracic plates much washed 

 with yellow. Thighs striped with black rather than banded. Ros- 

 trum black. Fourth ventral segment almost entirely yellow, the 

 second and third with a median yellow stripe. Hypopygium ol the 

 female dark, connexivum yellow, slightly blotched with blackish. 

 Valvules of the female chiefly yellow, somewhat dusky above. 

 Tergum black, the penultimate segment broadly edged posteriorly 

 with yellow. 



This species was first brought to our notice as an injurious insect 

 May 23, 18S4, when it was collected by Mr. Garman in fields of 

 poor young wheat near Decatur, in such numbers as to suggest the 

 probability of its injurious influence. It was this spring collected 

 in large numbers from young wheat at Marshall, May 22, and at 

 West Union on the 24th, where it seems to have been very abun- 

 dant. At DuQuoin, on the 7th of June, it was found associated 

 with the previous species in wheat, and August 4, a few specimens 

 were collected from sorghum at Champaign. It has occurred rarely 

 also in young corn. 



