Jassidce of Illinois. 31 



lutn with the usual scars and striations behind. Legs and under 

 surface lighter. Elytra with five apical and four anteapical 

 cells. Wings hyaline. 



Abdomen unicolorous green. 



Not so common as the preceding species. 



G. nigra, n. sp. 



Black above; margin of the thorax and the elytra yellow- 

 ish green; beneath green. 



Length 9 mm. 



Head. Above without median groove, the surface irreg- 

 ularly striated, the strias extending obliquely forward; color 

 black; eyes, a narrow margin near them, a line extending for- 

 wards and inwards from the ocelli, and a spot near the posterior 

 margin of the head, behind them, yellowish green. Beneath 

 green. 



Thorax. Pronotum black, with the lateral margins, and 

 sometimes a spot on the anterior edge, green. Beside the usual 

 lateral scar, there is a smaller additional one just behind it. 

 Only the posterior portion of the disk striate. Scutellum black, 

 with the corners yellowish green. Legs and under surface 

 lighter. Elytra with five apical and four anteapical cells, color 

 light yellowish green, semi-transparent. 



Abdomen black above and green below. 



G. albimarginata, n. sp. 



Scutellum and elytra black; head, thorax, and edge of 

 elytra greenish yellow. Beneath greenish marked with black. 



Length 10 mm. 



Head. Above, with a scar on either side near the base; 

 color pale greenish yellow with the median groove and scars 

 brown. Beneath yellowish green, with brown patches in the 

 prominent frontal striations and on the genae. 



Thorax. Pronotum pale yellowish green, with the pos- 

 terior border brown. Sears four, as in G. nigra. Only the 

 posterior half of the disk striate. Scutellum black, with two 

 brownish spots on either side near the front margin, and also, 

 sometimes, a broad, shallow median groove, brown. Posterior 



