SUB-FAMILIES OF TETTIGID^E. XXXIX 



ocelli before the eyes (Anterocelles), and resting 

 on the more or less angular border of the head. The 

 Delphacid^ have the ocelli placed below, and on the 

 gulae or cheeks. 



Mr. John Scott laid stress on the importance, in 

 several large genera, of the shape of the genital and 

 anal appendages. These details, together with the 

 form and ridged character of the clypeus, pronotum, 

 and scutellum must be duly considered. 



It is believed that any attempt to describe in words 

 the disposition of the nervures and cells of the elytra, 

 and those of the wings, would prove of little practical 

 use. On the other hand, drawings of such, made 

 under the camera lucida, ought to give much assistance 

 towards the identification of genera. Both Fieber's 

 and Sahlberg's memoirs furnish outlines of such details, 

 and these can be advantageously consulted. 



Sub-families of British Tettigid^. 

 i. cicadides. 



Head short and wide. Ocelli three, placed on the 

 vertex or crown. Tegulte wanting. Fore femora 

 thickened and strongly toothed. Claws two, and with- 

 out pulvilli. Males provided with two stridulating 

 drums at the base of the abdomen. Elytra multi- 

 cellular. 



II. MEMBRACIDES. 



Ocelli two, placed on the vertex. Frons or face 

 nearly horizontal. Tegulae wanting. Pronotum pro- 

 duced backwards into a horn-like process. Elytra with 

 five apical cells. 



III. TETTIGOMETRIDES. 



Frons nearly flat with the guhu or cheeks. Elytra 

 horny, with raised nervures. Teguhe conspicuous. 

 The antennal setae rising from the hind side of the 

 second joint. 



