44 Mr. James Edwards' Synopsis of 



which they are stored ivell supplied with camphor, 

 which will effectually prevent any inconvenience either 

 from mould or mites. A critical examination of the 

 genitalia of the smaller species is best accomplished 

 when the abdomen has been mounted in Canada balsam, 

 but this should always be preceded by a thorough in- 

 vestigation of the parts in question in an unmounted 

 state. 



I have much pleasure here in thanking those who 

 have kindly helped me with the loan of specimens, &c., 

 and especially are my warmest acknowledgments due to 

 my father in Entomology, Mr, J. W. Douglas, for the 

 valuable assistance which he has at all times most 

 readily afforded me for many years past. 



HOMOPTERA. 



Montli suctorial. Eostrum springing from the hind margin of 

 the under side of the head. 



CICADINA. 

 From 1 — 3 basal joints of the antenna; thick, the remainder 

 forming a terminal seta. Elytra deflexed, of nearly equally firm 

 consistence throughout. Hind legs generally long, ijowerful, and 

 formed for jimiping. Tarsi 3-jointed. 



1 (2). Front thighs thickened, toothed be- 



neath I. CiCADIDiE. 



2 (1). Front thighs not thickened nor toothed 



behind. 



3 (4). Pronotum produced into a process be- 



hind . . . . . . . . . . 11- Memehacid^. 



4 (3). Pronotum not produced into a process 



behind. 



5 (12). Antenna inserted beneath the eyes. 



G (7). Frons nearly on the same level with the 



cheeks. Elytra horny . . . . HI. Tettigometiiid.e. 



7 ((■»). Frons distinctly projecting from the 



cheeks, with sharp or keeled side 

 margins. 



8 (U). Clypeus without marginal keels. Elytra 



horny IV. IssiDJi. 



'J (H). Clypeus with marginal keels. Elytra 

 membranous. 



10 (11). 1st joint of hind tarsi without a spur at 



the base V. CixiiD.Ti:. 



11 (10). 1st joint of hind tarsi with a spur at 



the base . . . . . . . . VI. DELi'UACiDiE. 



