British Homoptera-Cicadina. 87 



(? . Pale yellow, claws fiiscous. Scutellum two-thirds longer 

 than pronotnm, its side keels distinct, diverging. Elytra yellowish 

 hyaline, aboiit one-half as long as abdomen, separately rounded at 

 the apex ; nerves raised, concolorous. Upper notch of pygofer 

 angular with sinuate sides, its margin, when viewed from the side, 

 forming an obtuse but distinct angle with the vertical hind margin. 

 The styles are really placed horizontally, so that only their ends 

 are visible when viewed in situ behind. (Plate II., figs. 7 and 8). 



Macrojjteroits form. — Scutellum two and a half times as long as 

 pronotum, its side keels scarcely perceptible, slightly diverging. 

 Elytra hyaline, nearly twice as long as abdomen, narrowly rounded 

 at the apex, nerves yellowish white. 



$ . Similar in colour to the male. Elytra in the macropterous 

 form about two-thirds longer than the abdomen. Length, 

 2— 3i mm. 



Stratton Strawless, Norfolk. The male of this species 

 may be easily recognised by the structure of the genitalia, 

 but the female is hardly to be distinguished from that of 

 the next. 



43. Lihurnia flavcola, Flor. 



Delphax Jiaveola, Flor, Ehyn. Liv., ii., 72, 19; Kirschb., 



Cicad., 34, 31 ; Fieb., Grundz. Delph., t. 8, fig. 55 



( 3' genitalia). 

 Lihurnia Jiaveola , J. Sahl., Not. Fenn., xii., 459, 25 ; 



Fieb., Cicad. d'Eur., pt. iv., 61, 56 ; Scott, Ent. 



Mo. Mag., xiii., 130. 



Yellow or somewhat ferruginous. Central facial keel acute, 

 obsolete on the forehead. Elytra pale yellow, transparent, about 

 one-half as long as abdomen, then- apex broadly rounded. Legs 

 yellow, sometimes with a reddish tinge, claws dark brown. Abdo- 

 men sometimes brown above. Upper notch of pygofer (male) 

 angular with sinuate sides, its margin, when viewed from the side, 

 passing gradually into the convex hind margin. Styles narrow- 

 lanceolate, obliquely truncate at the apex. Teeth of anal tube 

 large, blunt. Length, 2 mm. 



Mac rojitcrous form,. — Elytra nearly twice as long as abdomen, 

 pale, transparent; nerves pale, finely granulate, marginal nerve of 

 membrane brownish. Length, 3 mm. 



London district ; in July. 



