British Homoptera-Cicadina. 107 



(?. Crown dark brown or black, narrowly greenish yellow in 

 front with a black puncture on each side. Face greenish yellow, 

 generally with a narrow black band above not reaching the ocelli 

 at either end. Pronotum greenish yellow, the channels of the 

 sculpture mostly blackish. Scutellum reddish yellow; a large 

 triangle on each side at the base, a narrow central stripe reaching 

 as far as the transverse channel, and occasionally a pair of minute 

 round spots just above the latter, reddish brown or black. Elytra 

 whitish hyaline, clavus with a faint yellow-brown tinge ; the apical 

 areas, an ill-defined spot on the base of the second and third sub- 

 apical areas, the apex of the clavus, and the space between the 

 apices of the anal and axillary nerves, dark brown, claval suture 

 and the nerves blackish brown, the basal half of the axillary nerve 

 white. Abdomen above black, hind margins of the segments very 

 narrowly yellow. Hind tibiae with a black stripe on the outer 

 edge only. 



5 . Crown, face, pronotum, scutellum, and i;pper side of the 

 abdomen reddish yellow-brown, generally without darker markings. 

 Elytra brown, the discs of the subcostal area and the one below it 

 and the apical three-fourths of the subapical areas whitish hyaline. 

 Length, 4 — 5 mm. 



On sallow and birch ; somewhat local. 



3. Bythoscopus flavicollis, Linn. 



Cicada flavicollis^ Linn., Faun. Suec, 242, 891. 

 Jassus retimdatus, fcrrugineus, JiaricoUis, pulcliellus^ 



fencstratas, and personatiis, Curt., Brit. Eut., 636, 



2—7. 

 Pediopsis fruticola, Flor, PJiyn. Liv., ii., 184, 2; 



Marsh., Ent. Mo. Mag., ii., 125, 3 ; Kirschb., 



Cicad., 170, 1 ; Thorns., Opusc. Ent., iii., 318, 2. 

 P. flavicollis, J. Sahl., Not. Fenn., xii., 120, 3. 

 Bythoscopus fruticola, Fieb., Eur. Bythosc, 457, 2 ; 



Scott, Ent. Mo. Mag., x., 126, 2. 



An exceedingly variable species, but always easy to 

 distinguish from its congeners when once the structural 

 characters of the face have been appreciated. The 

 following are some of the more usual colour varieties : — 



1. Elytra whitish hyaline, nerves blackish brown. 



2. Ui^per side entirely pale brown. 



3. Upper side greenish yellow. 



