562 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



to see and the descriptions of some of them are so inadequate that 

 they can not be included in the synopses. These, however, I have 

 listed where they probably belong. It might be well to suggest that 

 in using these keys it will be necessary to run down in both subheads 

 where the characterization is rather variable or intergrades. In 

 several cases the same species has been included in two places in the 

 synopsis. 



KEY TO THE AMERICAN GENERA. 



a'. Post-tibial spur (calcar) not foliaceous or bilaminate, usually spiniform or cultrate. 

 ¥. Calcar without teeth, terete, spiniform, acute at tip. 

 c'. Antennae very long, flattened, foliaceous, I nearly as long as II; scutellum 

 tricarinate; elytra very conspicuously asperose; frons tricarinate. 



Copicerus Swartz. 

 c^. Antennae shorter, terete, I distinctly shorter than II; frons with two median 

 carinse. 

 rlK Body large; frons very broad; scutellum o-carinate; male genitalia termi- 

 nal instead of subventral Pentagramma Van Duzee. 



(P. Body slender, smaller; frons narrow, elongate; scutellum tricarinate. 



Lepticus, new genus. 

 b^. Calcar not spiniform, with or without teeth; frons tricarinate. 

 c'. Antennae terete. 

 dK Calcar subcultrate, triangular prismatic, without teeth, acute at tip; scu- 

 tellum 5-carinate; elytra very aeperose; hind tibiae with 4 lateral spines. 

 e^. Elytra with a large stigma on margin of corium; frons rather narrow; 



eyes not emarginate beneath Eucanyra, new genus. 



e^. Elytra without stigma; frons conspicuously broadened at clypeus. 



Epibidis Fowler. 

 (P. Calcar with a row of teeth posteriorly; hind tibiae with less than 4 lateral 

 spines; scutellum tricarinate; elytra without stigma. 

 eK Antennae very short, segments subequal; calcar w^th 3 long teeth, appa- 

 rently trifid; hind tibiae trispinose Dichoneura Lethierry. 



e^. Antennae longer, as long as frons, I shorter than II; calcar with a row of 

 about 8 teeth; hind tibiae bispinose; vertex produced in front. 



Proterosydne Kirkaldy. 

 cP. Antennae compressed; head very broad, sometimes broader than thorax. 

 d^. Antennae seldom longer than width between antennal insertions; median 

 frontal carina forked at apex of head; calcar long, cultrate, with a row 



of 7 to 11 coarse teeth on margin Stobaera Stk\. 



d?. Antennae distinctly longer than width between bases, carinately foliaceous; 

 median frontal carina forked below apex of head, branches widely sepa- 

 rated; gense almost obsolete; calcar large and broad, three-sided, each 

 side flat, not foUaceous, with a number of very minute spines, scarcely 



visible, on one edge Cochise Kirkaldy. 



3^. Calcar bilaminate or tectiform, more or less foliaceous, with one face more or less 

 concave, posterior margin usually finely or coarsely dentate. 

 6'. Basal antennal segment compressed, second compressed or terete; antennae 

 long, prominent; head transverse, at least as broad as pronotum. 

 c^ Basal antennal segment longer than second; anterior femora compressed; head 

 not broader than prothorax; clypeus normal; frons tricarinate. 



Delphax Fabricius. 



