BY F. W. GODING AND W. W. FROGGATT. 567 



Synopsis of the Genera of the Subfamily CiCADiNiE. 



1 (4). Lateral borders of pronotum dilated, horizontal, 



front angles directed toward middle of eyes. 



2 (3). Anterior border of head almost straight, base of 



front barely evident; tegmina and wings some- 

 times opaque and coloured Platypleura. 



3 (2). Anterior border of head very strongly and trian- 



gularly produced forward; tegmina and wings 



colourless Cyclochila. 



4 (1). Lateral borders of pronotum convex, front angles 



directed below eyes; tegmina and wings some- 

 times partly coloured. 

 5(16). Postcostal marginal space of tegmina linear, not 

 broadened towards apex. 



6 (7). Front angles of pronotum covered by lateral parts 



of head, not prominent; head broader than front 

 of thorax, front very convex; sides of abdomen 

 parallel to beyond middle Psaltoda. 



7 (6). Front angles of pronotum not covered by lateral 



parts of head, frequently distinctly prominent. 

 8(15). Basal area of tegmina somewhat, rarely twice, 



longer than wide; tympanum wholly covered. 

 9(10). Metasternum elevated at middle and furnished 



with a process directed posteriorly Cryptotyiipana. 



10 (9). Metasternumlittleelevated, destitute of a posterior 

 process. 



11(12). Apex of clypeus truncated, or subsinuately trun- 

 cated Cicada. 



12(11). Apex of clypeus acuminate; tympanal coverings 

 frequently developed into enormous sacs. 



13(14). Pronotum somewhat broadened forward, or sides 

 parallel; head and front of thorax equal in 

 breadth; ocelli four times more distant from eyes 

 than from each other; opercula short, transverse. Thopha. 



14(13). Pronotum narrowed forward, narrower than head; 

 ocelli two, sometimes three times more distant 

 from eyes than from each other; opercula medium Henicopsaltria. 



15 (8j. Basal area of tegmina twice longer than broad; 



part of tympanum uncovered; apex of clypeus 

 subacuminate, or a little rounded Tettigia. 



16 (5). Postcostal marginal space a little broadened to- 



wards apex; lateral margins of pronotum some- 

 what flattened Tympaxoterpes. 



