NO. 34.] HEMIPTERA OF CONNECTICUT: CICADELLIDAE. 89 



Nionia Ball. 



Goniagnathus Van Duzee. 



Vertex short, apex obtusely angled. Ocelli on anterior margin 

 distant from eyes. Anterior margin of pronotum produced beyond 

 anterior margin of eyes. 



N. palmeri (Van Duzee). Goniagnathus palmeri Van Duzee. 

 (Fig. 8, 1.) 



Can. Ent, xxiii, 171, 1891. 



Short, robust, head conically pointed, anterior margin of pro- 

 notum extending beyond anterior margin of eyes. Black shining, 

 resembling a Macropsis in general appearance. Length 4 mm. 



Perhaps occurs on grasses in Connecticut, usually quite common 

 in old pastures and waste places on herbaceous plants. 



North Branford, 2 June, 1921, 23 May, 2-5 June, 1 Aug., 1922 (B. H. W.) ; 

 5 July, 1921 (P. G.). 



Tribe JASSINI. 



Jassidae. 

 Ocelli on margin of vertex usually very close to eyes. 



Key to Genera. 



1. Vertex produced, anterior edge sharp, often flattened, thin and 



foliaceous. (Fig. 9, 3.) 2 



Vertex often produced, acutely angled or rounded but margin not 

 thin or foliaceous. (Fig. 9, lib, and 13a.) 5 



2. Elytra narrowed posteriorly to pointed tips, general color brown- 



ish Dorydiella, p. 91 



Elytra not narrowed posteriorly, apices well rounded, general color 



greenish 3 



3. Elytra with two claval veins. (Fig. 9, 7.) 4 



Elytra with one claval vein. (Fig. 9, 2.) Spangbergiella, p. 93 



4. Vertex greatly longer than basal width between eyes, thin and 



foliaceous, usually with color markings, elytra very short, 

 greatly exceeded in female by abdomen and ovipositor. (Fig. 



9, 3.) Hecalus, p. 91 



Vertex broader between eyes than length at middle, without color 

 markings, elytra longer, covering or only slightly exceeded by 

 abdomen. (Fig. 4.) Parabolocratus, p. 93 



5. Inner sector of elytra twice forked, three artteapical cells formed. 



(Fig. 9, 5 and 7.) 6 



Inner sector of elytra not forked, only two anteapical cells. (Fig. 



9, 8, 9 and 10.) 22 



6. Vertex as long as or almost as long as width between the eyes, 



disc flat or furrowed, and a rather distinct margin between 



vertex and front. (Fig. 9, 11.) 7 



Vertex usually greatly wider than long, in most cases with disc 

 sloping and margin rounding to front. (Fig. 9, 12 and Fig. 10, 



14.) • • • 12 



7. Elytra with two cross nervures between first and second sectors 



or with supernumerary veinlets to costa or both. (Fig. 9, 7.) . . 8 

 Elytra with one cross nervure between first and second sectors 

 (occasionally with two in Thamnotettix). (Fig. 9, 5, and Fig. 



10, 5.) 10 



