HEM IP TERA , 1 49 



B. With three ocelli, and the males with musical organs. Usually- 

 large insects, with all the wings entirely membranous, p. .149. 



CiCADIDiE. 



r BB. Ocelli only two in number or wanting ; males without musi- 

 cal organs. 

 if i- C. Antennae inserted on the sides of the cheeks .beneath the 



eyes. p. 15 1 FuLGORiD^. 



/;/ CC. Antennae inserted in front of and between the eyes. 

 X 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.. . CERCOPiDiE. 

 EE. Hind tibiae having a row of spines below p. i53..JNrtiSgfegE; C 

 7 DD. Prothorax prolonged into a horn or point above the 



abdomen, p. 1 54 Mem brag id/e. 



A A. 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 PSYLLID^. X, 



D. Legs long and slender, not fitted for leaping ; antennae 



three to seven jointed, p. 1 56. 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 CocciDiE. 



^je'i'4 



Family CiCADID/E (Ci-cad'i-d^). 

 T/ie Cicadas {Ci-ca' das). 



The large size and well-known songs of the more common 

 species of this family render theni 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 



