4 BRITISH CICADA. 



" This singular insect is very variable, both as to its 

 colouring and as to the proportions of its flat and leaf- 

 like head. The three varieties noted in the synonyms 

 may be sometimes taken in company, but the differ- 

 ences to be noted in them " are more differences of 

 degree " than of a truly specific kind ; thus there 

 appear to be good reasons for regarding them as one. 



Male. Head deltoid, with curved edges. General 

 colour of the insect ochreous-grey. Eyes reddish, or 

 in older specimens brown. Central keel rather pro- 

 nounced. Head as long as the pronotum and scutel- 

 lum taken together. Eostrum very short. Abdomen 

 fusiform, ochreous, with smoky sides and a stripe down 

 the dorsum. Legs ochreous, with fine outer and inner 

 spines. Elytra greenish, with marked whitish nervures, 

 forming three discoidal cells. The nervures often finely 

 punctate. Limbus narrow, bounding four apical cells. 

 Wings with the third nervure united to the second by 

 a bifurcation or a small transverse line (variable). 



The female is paler in colour than the male. Eieber 

 represents the last abdominal segment with three lobes. 

 The pupa has a pointed head, with a marked central 

 keel. The elytra! and the wing cases are green and 

 acuminate. Colour much paler, and sometimes almost 

 white. Abdomen somewhat mealy and deeply ringed, 

 each segment provided with two brown spots. Cauda 

 very pointed. 



This is not a common species, but sometimes it 

 may be taken fairly numerously at Haslemere, on 

 grasses growing on sandy banks, in June and July. 



Size of body, 0*27 inch, or 7*00 millimetres. 



Genus XXVIIL— STKONGYLOCEPHALUS, Flor. 



Vertex produced to an obtuse angle, transversely 

 striated. Erons divided from the vertex by a thin 

 edge, near to which the ocelli appear as black spots, 

 situated about half-way between the eyes and the 



