126 BRITISH CICADA. 



Genus XXVI.— EU ACANTHUS, Lejj. et Serv. 



Head with eyes broader than the thorax. OcelH dis- 

 tinct, and placed on the margin of the vertex. Kostrum 

 equal to the length of the clypeus. Elytra coriaceous ; 

 nervures raised. Anterior tibiae smooth ; inner side 

 setose. Hind tibiae quadri-prismatic, strongly spined 

 and setose. 



EuACANTHUs iNTERRUPTus, Limi. Plate XXXVni., 

 figs. 1 to If. 



Cicada interrupta, Linn. ; Fab. ; Fall. 

 Amhlycephahis interruptus, Curt. 



Euacanthus interruptus, Burm. ; Flor ; Marsh. ; Kirsch. ; 

 Sahl. ; Edw. pt. ii. p. 14. 



Body long, tapering much to the tail. Head with 

 eyes broader than the pronotum. Ocelli distinct, and 

 placed on the anterior margin of the vertex. Pronotum 

 squarish, with lower margin obscurely emarginate. 

 Scutellum triangular. Abdomen acuminate. Elytra 

 dense, bright yellow, with a broad black unequal bar 

 proceeding from the base to the apex, traversing part 

 of the corium and the clavus ; another black mark 

 proceeds from the apex, and becomes narrower as it 

 stretches over the rest of the corium. Legs yellow. 

 Fore and middle tibiae sparsely ciliated ; the hind 

 tibiae spined and setose. 



The venation of the elytra is difficult to make out, 

 as the nervures lose themselves in the transparent 

 parchment-like texture. According to Fieber's figure 

 there are one costal, one cubital, one basal, one sub- 

 cubital, one discoidal, and four apical cells. The clavus 

 is nearly as large as the corium. 



This insect occurs in two forms; apparently in 

 different conditions of development, which Sahlberg 



