HEM IP TER A. 
149 
B. With three ocelli, and the males with musical organs. Usually 
large insects, with all the wings entirely membranous, p. 149. 
Cicadid^e. 
BB. Ocelli only two in number or wanting; males without musi¬ 
cal organs. 
C. Antennae inserted on the sides of the cheeks beneath the 
eyes. p. ... Fulgorid^e. 
CC. Antennae inserted in front of and between the eyes. 
D. Prothorax not prolonged above the abdomen. 
E. Hind tibiae armed with one or two stout teeth, and the 
tip crowned with short stout spines p. 152... Cercopim:. 
EE. Hind tibiae having a row of spines below p. 153. Jassid^e. 
DD. Prothorax prolonged into a horn or point above the 
abdomen, p. 154..*. Membracidas* 
AA. Beak apparently arising from between the front legs, or absent; 
tarsi one or two jointed; antennae usually prominent and thread¬ 
like, sometimes wanting. 
B. Tarsi usually two-jointed; wings when present four in number. 
C. Wings transparent. 
D. Hind legs fitted for leaping; antennae nine or ten jointed. 
p. 155.PSYLLIDiE. 
D. Legs long and slender, not fitted for leaping; antennae 
three to seven jointed, p. 156. Aphidid^e. 
CC. Wings opaque, whitish ; wings and body covered with a 
whitish powder, p. 163. ALEYRODlDiE. 
BB. Tarsi one-jointed ; adult male without any beak, and with 
only two wings; female wingless, with the body either scale¬ 
like or gall-like in form, or grub-like and clothed with wax. The 
waxy covering may be in the form of powder, of large tufts or 
plates, of a continuous layer, or of a thin scale beneath which the 
insect lives, p. 164. Coccid^e. 
Family ClCADlD/L (Ci-cad'i-dae). 
The Cicadas (Ci-ca*das'). 
The large size and well-known songs of the more common 
species of this family render them familiar objects. It is only 
necessary to refer to the Periodical Cicada (or the seventeen- 
year locust, as it has been improperly termed) and to the 
