SUB-ORDER HOMOPTERA. 
D. Legs long and slender, not fitted 
for leaping; antennz three- 
LOVSEVENJOINted at ties. eos sees 
DD. Hind legs fitted for leaping; an- 
tennz nine- or ten-jointed.... 
AA. Beak evidently arising from the mentum ; 
tarsi three-jointed; antennz minute, 
setiform. 
B. With three ocelli, and the males with 
musical organs. Usually large in- 
sects, with all the wings entirely 
ETICTMD EAN OUSE, Stopctyn sats Stan ohare: 
BB. Ocelli only two in number, or want- 
ing; males without musical organs. 
C. Antenne inserted on the side of 
the cheeks beneath the eyes... . 
CC. Antennz inserted in front of and 
between the eyes. 
D. Prothorax prolonged into a 
horn or point above the ab- 
DD. Prothorax not prolonged above 
the abdomen. 
E. Hind tibiz armed with one 
or two stout teeth, and 
the tip crowned with 
short, stout spines...... 
EE. Hind tibiz having a double 
row of spines below.... 
99 
APHIDIDAE, 
PSYLLIDAE. 
CICADIDAE. 
FULGORIDAE, 
MEMBRACIDAE, 
CERCOPIDAE. 
JASSIDAE. 
Other authors have divided these insects in a much larger 
number of families, but in a report of this kin¢l it is not neces- 
sary to do so. 
