6. Hind femora much thickened; antennae long, 5 to 10-jointed, last 

 joint with two fine apical bristles; front wings somewhat thicker 

 than the hind ones, often rather leathery; pad between the tarsal 

 claws prominent, bilobed, CHERMIDAE. 



Hind femora not much larger than the others, 7. 



7. Tarsi 2- jointed, the basal joint sometimes reduced, the outer joint 

 with two claws; wings, when present, four in number; mouth-parts 

 usually well-developed in both sexes, 8. 



Tarsi, when present, 1-jointed, with a single claw; females always 

 wingless, often without legs and usually covered with a more or less 

 well-developed scale; males usually with a single pair of wings which 

 lie flat, one above the other; antennae of the females absent or having 

 up to 11 joints, of males 10- to 25-jointed, COCCIDAE. 



8. Wings usually opaque, whitish, clouded or mottled with spots or 

 bands; body more or less mealy; tarsi with two nearly equal joints; 

 tip of tibiae with a number of short spines; a pad-shaped or spine- 

 like process between the tarsal claws, ALEYRODIDAE. 



Wings transparent, though sometimes colored; tarsi 2-jointed, the 

 basal joint sometimes very much reduced; body not mealy, but rarely 

 with waxy wool; process between the tarsal claws absent or nearly 

 so, APHIDIDAE. 



The sub-order Homoptera is divided into two main 

 groups, the Auchenorhynchi, in which the beak or rostrum 

 plainly arises from the head, and the Sternorhynchi, in 

 which it arises apparently from the sternum between the 

 anterior coxae. The first group contains six different 

 families, one of which, the Fulgoridae, is fully treated 

 in this bulletin. 



The following classification has been adopted, the ar- 

 rangement being from the more primitive to the more 

 specialized. This represents the type of specialization in 

 the forms today and does not necessarily indicate the points 

 of divergence from a common stem in the matter of origin, 

 which latter cannot be shown in serial arrangement. 



ORDER HOMOPTERA LATR. 



Group I AUCHENORHYNCHI Amyot & Serville. 



Super-family 1 CICADOIDEA. 



Family 1 CICADIDAE. 



Family 2 CERCOPIDAE. 



Sub-family 1- Cercopinae 



2 Aphrophorinae 



