Jassidce of Illinois. 29 



Tribe II. Gyponina. 

 Genus IV. Gypona. 



Gypona Germ., Mag. d'Ent. Tome IV., p. 73. 



Oval, flattened insects, about one cm. long by two or three 

 mm. wide; generally green. 



Head about twice as wide as long; anterior margin strongly, 

 and the posterior but slightly, curved. Eyes, as seen from 

 above, large, triangular, situated on the outer corners. Ocelli 

 on the vertex, often on short tubercles. Vertex often longi- 

 tudinally furrowed. Thorax about two and a half times as 

 wide as long; the anterior and posterior edges about equally 

 curved; lateral edges composed of two nearly straight portions, 

 united at about one third from base in an obtuse angle, — the 

 outer angle. The sculpturing consists of a series of nearly 

 parallel transverse striations, sometimes interrupted anteriorly 

 by a large scar. Scutellum triangular, the top-shaped tip gen- 

 erally marked off by a distinct suture. The whole scutellum is 

 sculptured like the thorax, even to the large lateral anterior 

 scars. Elytra with two veins on the clavum, the radial 

 vein forked and the apical and anteapical cells variable 

 according to the species. Wings hyaline. Abdomen with six 

 segments in the male and five in the female. Beneath, the 

 legs close together, increasing in size from before backwards. 



I have seen five species of this genus from Illinios, four 

 new. Two others have been described from this State; one by 

 Uhler, the description of which I append, and the other by 

 Sahlberg, which I have not seen. 



The following table will serve to distinguish the five species 

 that I know: 



Not red above. 



Elytra white or light yellow. 



Head and thorax light yellowish. 



Thorax 8-lineate with red G. S-linhata, 



Thorax bipunctate with black . . G. bipunctulata. 

 Head and thorax black G. xiora. 



