298 E. p. VAN DUZKE. 



— , First sector of the elytra forked close to its base, thus forming apparently 

 tiiree sectors, which run straight aud undivided to the angular nervures 

 separating the four apical areoles ; no transverse nervures between the 

 first and second sectors; wings without a supernumerary cell; ocelli 

 usually wautiiig Subfamily TYPHLOOYBINA 



Tribes of the JASSINA. 

 Anterior edge of the head thin and sharp, or more or less foliaceous. 



DORYDINI 



Anterior edge of the head sometimes acute, but generally obtuse or rounded 



never thin and foliaceous (A) 



A. Elytra with two transverse nervures between the first and second sectors 



of the corium DELTOCEPHALINI. 



— . Elytra with but one transverse nervure between the first and second sec- 

 tors of the corium (B). 



B. Elytra without a series of antiapical areoles, or with but one formed by 



the forking of the outer branch of the first sector; vertex subquadrate, 

 hind and lateral margins elevated, before feebly arcuated, with the edge 

 strongly rounded, or produced and tumid before with an obtuse apex. 



JASSINI. 

 — . Elytra with a series (generally three) of antiapical areoles (C). 



C. Outer branch of the first sector of the elytra with two forks evident. 



ATHYSANINI. 



— . Outer branch of the first sector of the elytra with its outer fork obsolete, 



or nearly so; anterior edge of the head well rounded, vertex but little 



if at all longer on the middle than next the eye CICADULINI. 



Synopsis of the genera of the Jassidae. 



Subfamily ACOCEPHALINA. 

 Head rounded anteriorly, the edge thin, vertex transversely striated before par- 

 allel to the anterior edge; apex of the wings broadly rounded. 



^itroiigylocephalus. 



Head more or less angled or conical before, the edge either acute or obtuse, or 

 rounded and tumid, apex of the wings narrower, subacute; vertex not 



striated before parallel to the anterior edge (A). 



A. Anterior edge of the head acute or subacute in the female, obtuse or 

 rounded in the male; vertex more or less distinctly longitudinally ru- 

 gose, the disc depressed or but feebly convex Acoceplialus. 



— . Head tumid and rounded before, ocelli placed on the rounded anterior 

 edge superiorly, distant from the eyes; vertex convex, closely evenly 

 punctured, without longitudinal rugte Xestocephalus n. gen. 



Subfamily JASSINA. 



Tribe DORYDINI. 



Vertex greatly elongated, at least twice as long as broad (A). 



Vertex not more than twice as long as broad .. (B). 



A. Vertex anterior to the eyes spoon-shaped Cocliloi'liiiiiis. 



— . Vertex ligulate in form Doryeeplialus. 



