112 BRITISH CICADiE. 



previous species. Abdomen brown, with yellow 

 edgings to the body-rings : apex cleft, but under a 

 high magnifying power seen to be constituted of two 

 fasciculi of long hairs. Elytra greenish hyaline, some- 

 times having on each a broad band ; but always fur- 

 nished with coarse, more or less disjointed, brown 

 nervures, giving the organs a brocaded appearance. 

 Limbus rather narrow. Wings delicate and iridescent. 

 Legs ferruginous ; all the tibise are furnished with a 

 fine dark stripe. 



Inch. Millimetres. 



Expanse 0*50 11*5 



Length of body 0*17 4*5 



Feeds on Salix triandra. The I. similis of Kirsch- 

 baum appears, from a comparison with Dr. Puton's 

 types, to be identical with this species. Its chief 

 difference would seem to consist in a brighter yellow 

 costa and a somewhat conspicuous round costal spot. 



The female has its frons much clouded and speckled. 

 The pubescence on the cheeks is less marked than in 

 I. adustus, which in many respects it resembles. 



The elytra, however, are more banded, and the 

 nervures are coarser. Also the tubercles on the costa, 

 very marked in I. adustus; are here barely visible. 



Idiocerus Herrichii, Kirschb. Plate XXXIII., 

 fig. 2, 2c. Edw. pt. i. p. 117. 



Head and eyes wide ; vertex yellow, with a greenish 

 grey irregularly-shaped stain between the eyes, which 

 is carried over and down the frons. Two black dots 

 occur near the eyes. A dark line separates the head 

 from the pronotum, which last has several small brown 

 marks. Scutellum of a pale greyish green, with brown 

 triangular patches. Abdomen black. The membrane 

 of the elytra unevenly mottled with greenish, with 

 brown and fuscous yellow tints. The costa stout, 

 imbricated, and marked by three long dark dashes, but 



