1873.1 81 



Species 8. — Idiocerus confusus, Flor. 

 Tdiocents confusus, Flor, Rhyn. Liv., Vol. ii, 179, 9 ; Ivirsclib., Cicad., 



164, 26 ; J. SaUb., Not. Fenn., part 12, 150, 11 (1871). 

 Idiocerus albicans, Kirsehb., Cicad., 164, 27. 

 lassus pojmli, Fall., Hem. Succ, Cicad., 60, 3, var. y ; Zett., Ins. 



Lapp., 301, 1, var. c. 



^ very pale yellow or greenish-wliite. AntenncB witt an apical 

 plate ; elytra without a transverse band ; scufellum without a black 

 triangular spot near the basal angles. 



Head : crown, face, aud clypeus pale yellow. AntenncB plate somewhat long, 

 oval, black. 



Thorax : pronotum pale yellowisli or greenish-white. Scutellum clear yellow or 

 greenish-white, without the usual black triangular spot near each basal angle. 

 Elytra : davits pale yellow between the inner margin and the central nerve, 

 and between the latter and the suture greenish-white, with the apex yellowish ; 

 inner margin between the central nerve and the suture blackish ; nerves pale 

 green. Cerium pale yellow, gradually becoming paler towards aud at the 

 anterior margin ; nerves pale green or greenish-white, nerves white. Membrane 

 somewhat brownish ; marginal nerve next the inner margin, and the apex of 

 one or two of the ceE nerves, black. Sternum yellow. Legs yellow. 



Abdomen above, black, side margins broadly yellow ; beneath yellow ; last genital 

 segment yellowish or greenish-white ; external processes white, apex black, 

 in appearance resembling those of /. adustus, clothed with long white hairs. 



$ usually greyish or greenish-white. Elytra with pale green or white nerves ; wheu 

 at rest there appears, more or less distinct, upon the clavus, two brownish tri- 

 angles, one between the base and the central nerve, the other between the latter 

 and the apex. Length, $ $ , 2\ — 3 lines. 



Not likely to be confounded with any other of our British species. 



Very common on sallows and poplars from July to September. 

 It has occurred at Lee, Bexley E-oad, &c. 



In addition to the foregoing described species, I may here add 

 that Mr. Douglas and I possess three other species, which I have 

 been as yet unable to determine. 



Genus BTTRO SCOPUS, Germ. 

 A genus, according to Fieber's catalogue, with five European 

 representatives, of which only one has hitherto been supposed to be 

 British ; on examination, I find we have really two species, and these 

 no doubt are mixed together in collections. It is a very pardonable 

 mistake, as the extreme variability both in colour and markings of 

 fniticola would induce any one to suppose the other species {alni) 

 merely one of its forms. But there are good specific characters, and 

 I hope the description given below will enable any one to separate 

 them. This genus is readily distinguished from Ilacrojisis by the 

 obtuse-angled shape of the hinder margin of the ci'own, and from 

 Idiocerus by the want of an antenual plate. 



