British Homoptera-Cicadina. 67 



? . Scutelluni scarcely one-half longer than the pronotiim. 

 Elytra greyish white, about one-third as long as abdomen, separately 

 ronnded at the apex. Wings wanting. Apex of the saw-case 

 lilack. Length, 4^ — 5 mm. 



Not common. 



11. Lihurnia vnicolor, H.-S. 



Delphax unicolor, Scliaff,, F. G., 143, 20. 



Chloriona unicolor, Fieb., Grundz, Delph., 519, 7, 



t. 8, fig. 5 (details) ; Cicad. d'Eur., pt. iii., 27, 2 ; 



J. Sahl., Not. Fenn., xii., 406, 1. 

 Lihurnia unicolor, Scott, Ent. Mo. Mag., vii., 25, 8. 



Elongate, greenish or yellowish white ; brachypterous female pale 

 green. 



(? . Basal keel of crown obtuse. Scutelhim twice as long as 

 pronotum. Elytra gi'eyish white, opaque, twice as long as the 

 abdomen, apex narrowly rounded, nerves with very fine black 

 hairs, second subapical area somewhat longer than the fifth. 

 Abdomen black, margins of the segments yellowish. Legs as in 

 smaragdida. Pygofer sometimes white. 



2 . Macrojjteroiis form. — Scutelluni more than twice as long as 

 pronotum. Elytra one-half longer than abdomen, gi-eyish white, 

 sometimes faintly famose at the apex. Brachypterous forvi. — 

 Scutelluni scarcely one-half longer than pronotum. Elytra one- 

 third as long as abdomen, greyish white, their apex separately 

 rounded. Length, 4 — 5 mm. 



On reeds, June and July. 



12. Lihurnia collina, Boh. 



Delphax collina. Boh., Sv. Ak. Handl., 51, 18 (1849) ; 



Flor, Khyn. Liv., ii., 70, 18 ; Marsh., Ent. Mo. 



Mag., i., 274, 15 ; Kh-schb., Cicad., 24, 8. 

 D.pallens, Stal, OiV., 192, 11 (1854); Fieb., Grundz. 



Delph., t. 8, fig. 27 ( <? genitalia). 

 Lihurnia collina, Scott, Ent. Mo. Mag., vii., 2G, 10; 



J. Sahl., Not. Fenn., xii., 429, 4; Fieb., Cicad. 



d'Eur., pt. iv., 19, 16. 



Pale yellow, with fuscous markings; keels of the head white, 

 with black margins. Crown somewhat longer than wide, basal 

 impressions subtriangular, fulvous, about half as long as the crown. 

 ScutcUum one-half longer than pronotum, side keels distinct. Elytra 



