British Homoptera-Cicadina. 99 



1. Philcenus spumarius, Linn. 

 It is unnecessary to encumber this work with the full 

 synonymy of this abundant and well-known species, 

 which may at all times be readily distinguished from its 

 congeners by the distinctly curved side margins of its 

 elytra. Some of its colour varieties are very constant 

 iu pattern, and the following, according to J. Sahlberg, 

 have received distinctive names : — 

 spunmria, Auct. Yellowish brown, costa with two largo transvereo 



white spots. 

 fasciata, Fab. Head and pronotum yeUow, elytra black with two 



large transverse white spots on the costa. 

 gibba, Zett. Crown and front half of the pronotum yellow ; hind 



part of the latter, scutellum, and elytra black, the latter with 



a large white transverse spot before the middle. 

 biguttata, Fab. Black mottled with yellow, elytra with a small 



round white spot behind. 

 leucojihthalma, Linn. Entirely black. 

 Icucocephala, Linn. Black with the crown and front of pronotum 



yellow. 

 lateralis, Linn. Black, sides of elytra widely yellow. 

 marginella, Fab. Black ; crown, front of pronotum, and sides of 



elytra yeUow. 

 vittata, Fab. Yellowish ; hind part of pronotum, scutellum, and a 



wide sutm-al stripe brown. 

 uttulata, Fall. Yellowish; crown, pronotum, and margin of elytra 



at the base and apex black. 

 prceusta, Fab. Yellowish ; hind part of pronotum, scutellum, and 



apex of elytra brown. 

 lineata, Fab. Yellowish ; middle of the hind part of pronotum, 



scuteUum, a stripe on the elytra, and the sutixre blackish 



brown. 

 populi, Fab. Unicolorous yellow. 

 Length, 5 — 6 mm. 



2. PJiilcBuus campestris, Fall. 



Cercopis campestris, Fall., Hem. Suec, ii., 20, 7. 

 Ptyelus campestris, Flor, Ehyn. Liv., ii., 125, 3 ; 



Kirschb., Cicad., 65, 4; Scott, Ent. Mo. Mag., 



vii., 243, 2. 

 Philcsnus caynpestris, J. Sahl., Not. Fenn., xii., 95, 6. 

 Upper side pale yellowish brown or fawn-colom', costa at the 

 base narrowly and two large triangular spots upon it behind white. 



