LIBURNIA COLLINA. 35 



LiBURNiA uNicoLOR, H.-S. Plate XI., fig. 5. 



Delphax unkolor, Schaff. 



Chloriona unicolor, Fieb., G. D. t. 8, fig. 5, and C. E. 



pt. iii. 27; Sahl. 

 Lihurnia unicolor, Scott ; Edw. pt. i. 67. 



Long. Macropterous male greenish white, with pale 

 greenish vertical and pronotal keels. Scutellum long, 

 pale, and dirty white. Eyes brown. Elytra long and 

 greenish, with very delicately marked brown nervures. 

 Abdomen black. Legs concolorous with the elytra. 

 The scutellum of the male is much longer than that 

 of the female. Pygofer sometimes whitish (Edwards). 



Found on reeds, Aruiido Phracjmites, from June to 

 August. Taken at Black Gang Chine, Isle of Wight, 

 and also at Lucerne, Switzerland. 



Fieber places these last two species, with three 

 others not British, in a separate genus, but the 

 characters hardly seem to be sufficiently distinct to 

 justify such a proceeding. The vertices of the last 

 two insects are long, but not so long as those pre- 

 viously described. 



Size, with elytra, 4*5 to 5'0 millimetres, or 0*17 to 

 0-19 inch. 



LiBURNiA COLLINA, Boh. Plate XL, fig. 6. 



Delphax collina, Boh. ; Flor ; Marsh. ; Kirschb. 



pallens, Fieb., G. D. t. 8, fig. 27. 

 Lihurnia collina, Scott; Sahl.; Fieb., C. E. pt. iv. 

 19, 16; Edw. pt. i. 67. 



Macropterous male. General colour pale yellow, with 

 indistinct fuscous markings. Vertex hardly protruding 

 beyond the eyes. Keels whitish. Scutellum longer than 

 the pronotum. Legs ochreous. Elytra pale yellow, with 

 round apices; length more than one and a half greater 

 than the abdomen. Frons with a brown or black ground 

 and whitish keels which appear above the vertex. 



d2 



