Xl INTRODUCTION. 



IV. ISSIDES. 



Clypeus without horny marginal keels or carinas. 

 Elytra strongly convex at the basal portion of the 

 costse. Wings with numerous transverse veins. Ocelli 

 indistinct or none. 



V. CIXIIDES. 



Ocelli indistinct, but placed on the frons half-way 

 from the apex. First joint of the hind tarsi with no 

 spur at the base. Nervures of the elytra much sub- 

 divided, and often studded with setigerous granules. 



VI. DELPHACIDES. 



First joint of the hind tarsi provided with a charac- 

 teristic laminated spur. Ocelli on the cheeks. Second 

 antennal joint large and tuberculated. Frons and 

 pronotum carinated. 



VII. CERCOPIDES. 



Antennae inserted between the eyes. Hind femora 

 furnished at their bases with a strong crown of spurs, 

 as also are the first two joints of the tibias. Ocelli 

 two on the vertex. 



VIII. LEDEIDES. 



Pronotum with a compressed ear-like process on 

 each side. Head large, angularly produced in front. 

 Eyes small. Ocelli at the base of the vertex. Anterior 

 edge of the tibiae fiat and serrated. Elytra coriaceous 

 and multitudinously veined. 



IX. ULOPIDES. 



Frons convex. Pronotum without side-processes. 

 Hind tibiae not serrated, flattened, and triangularly 

 prismatic. 



X. PAROPIDES. 



Each end of tlie carina, which divides the frons 

 from the vertex, furcated. Ocelli placed in the angle. 

 Frons flat. 



