— 25 — 



3 Wings very liroad at the middle, narrowed behind the middle. 



Second antennal joint suboblong or somewhat elongated 



G. 7. Mysidia, Westwood. 



Second antennal joint short, tuberculate with a dorsal seta 



G. 8. Ceuchrea, Westwood. 

 Wings not so broad in the middle. 



Second antennal joint elongated, sublinear, compressed, slightly obliquely 

 truncate at apex, setigcrous ; head compressed, subtriangiilar, with two 

 keels ; frons subrostrate, rostrum straight ; eyes prominent, subluiiate. ... . . 



G. 9. Anotia, Kn-by. 



Tribe IV. CIXIINI. 

 TABLE OF GENERA. 

 Posterior tibiie with one or three spines. 



Head with three triangular or transversely quadrangular facets 2. 



Head without facets, prominent. 



Vertex pentagonal, angularly grooved posteriorly or sinuately curved ; frons 

 almost a right- angle, twice longer than wide, high at its apex. 

 Elytra enlarged behind the clavus, covering one another ; posterior tibire with 



one small spine in the middle G. I. Cixidia, Fieber. 



Elytra of equal breadth, posteriorly rounded not dilated ; posteri(jr tibiae with 



three spines G. 2. Ommatissus, Fieber. 



2 Wings broadly triangular behind, trilobed at their exterior margin near the flexible 



suture tj. 3- Trirhacus, Fieber. 



Wings not lobed at their posterior border, feebly curved ; pronotum strongly, sub- 

 angularly incised posteriorly. 



Mesonotum with three keels G. 4. Cixius, Latreille. 



Me~onotum with five keels. 



Vertex elongate pentagonal ; frons with the median keel simple at apex ; 

 scutellum with the intermediate keel feeble ; posterior tibia; with two 



spines tr. 5. Hyalesthes, Signoret. 



Vertex more or less broadly pentagonal with sharp ridges ; scutellum with all 



the keels distinct ; posterior tibiae with three spines 



G. 6. Oliarus, Stal. 



Subfamily IX. DELPHACINiE. 



TABLE OF GENERA. 



AntenniB of variable length, the second joint longer than the first 2. 



Antennae long, first joint longer than the second. 



First antennal joint compressed, somewhat dilated above and below. 



Anterior legs dilated, foliaceous G. I. Asiraca, Latreille. 



Anterior legs not dilated, simple. 



Head as broad as the thorax ; antennae and legs moderate 



G. 2. Areopus, Spinola. 

 Head narrower than thorax ; frons narrow, elongate, narrowed upwards ; 



antennas and legs long G. 3. Sparnia, Stal. 



First antennal joint, subcylindncal, not compressed ; legs long, simple 



G. 4. Hapalomelus, Stal. 



2 Antennae greatly lengthened, dilated G. 5. Copicerus, Schwarz. 



Antennae simple, cylindrical or somewhat compressed. 



