114 BRITISH CICAD.E. 



concolorous, and some from Brockenhurst in which 

 the insects are uniformly brown. 



The male pygofer ends with a rounded plate, termi- 

 nated by three long setffi (fig. 3 h). 



Inch. Millimetres. 



Expanse 0-48 12-18 



Length 0-20 5-08 



Common on sallows in Foxley Wood, Norfolk, in 

 September; and in the New Forest, Hampshire. 



Idiocerus ALBICANS, Kivsckh. Edw. pt. i. p. 125. 

 Plate XXXIV., fig. 2, and Plate XXXV., tig. 2. 



Head, pronotum, and scutellum, greenish white. 

 Almost the whole of the male insect is spotless 

 white. Sometimes the greenish scutellum has 

 indications of the two dark triangular basal patches. 

 The elytra are nearly white or pale grey ; the nervures 

 white, and often imperceptible. The nervures of the 

 wings darker than the membrane. The abdominal 

 male segments sometimes are narrowly black at their 

 bases. Under-side all white, or very pale green. 



Feeds on Populus alba, and is common near Hud- 

 dersfield and round about Norwich, &c. It may be 

 generally recognised by the pale and mealy -like 

 character of the elytra. 



Length, with wings, 0*25 inch, or 6*5 millimetres. 



Idiocerus p(ecilus, H-Schaf. Plate XXXIV., 

 fig. 3, 3rt, and fig. 4. 



Bythoscopiis pa'cilus, H.-Schaff. 



,, falciger, Boh. 



Idiocerus falciger, Sahl. 



,, vnmstus, Scott. 



,, pacilus, Kirschb. ; Edw. pt. i. p. 121. 



