16 BRITISH CIOADJE. 



Genus XXXI.— GEAPHOCK^EUS,* Thomson. 

 Plate XLIII., figs. 1 to 16. 



Cicada ventralis, Fall. 

 Athjsanus ventralis, Flor; Kirschb. 

 Graphocrcerus ventralis, Thomson, Opusc.Ent. ; Sahib. ; 

 Scott; Edw. pi. III., fig. 2, p. 27. 



Vertex subangularly produced, and impressed behind 

 its reflexed apex. Ocelli very small and placed on the 

 vertical edge, rather less than half-way between the 

 eyes and the vertical point. General colour of the 

 insect ochreous-yellow, with three or more minute black 

 spots on the sides of the pronotum, and accompanied 

 by a few ferruginous stains, which also may be traced 

 on the scutellum. Abdomen oblong and fusiform, 

 barred transversely with pale brown, and marked with 

 a few dorsal perpendicular streaks. The abdomen 

 separated from tne prosternum by a ridge. Legs 

 ochreous ; the hind tibiae with minute dots, from which 

 the setae spring. Elytra in the females shorter than 

 the abdomen, but in the males rather longer. Venation 

 obscure ; but Sahlberg gives the tegmina as slightly 

 rounded, finely rugose, nervures raised, apical areas 

 short, and the intermediate area subquadrate. Prous 

 ochreous, with four spots in a straight line between the 

 eyes, and two brown lines converging to the clypeus. 



The above description is from the only specimen I 

 have seen, — a female, — and this named by Mr. 

 Douglas. 



Male genital valve rather shorter than the last 

 ventral plate. Pygofer (hypopygium) deeply sinuate 

 behind, with short lateral lobes. The saw-case of the 

 female free to the base, and hardly exserted beyond 

 the abdominal apex. 



This is far from a common insect. Its recorded 

 habitats are Weybridge and Lee ; also Abbey Wood, 



* From Tpa<pu and xpaipa, inscribed head. 



