British Homoptera-Cicadina. 71 



long as abdomen, rounded at apex; nerves strong, pitch-black, 

 closely and strongly granulate. Legs dirty brownisli yellow. 

 Upper notch of pygofer wide, triangular, occupying the entire 

 width of the segment, its margin, viewed &-om the side, straight, 

 oblique, and forming an obtuse angle with the vertical straight hind 

 margin, which it nearly equals in length ; lower notch bluntly 

 triangiilar, very lai'ge and deep, its margin, when viewed from the 

 side, forming an obtuse angle with the hind margin, the length of 

 which it somewhat exceeds. Styles, when viewed in situ under a 

 low magnifying power, scantily pilose, apparently strap-shaped, 

 slightly widened at their subtruncate apex, their lower half parallel 

 with the outUnc of the lower notch of the pygofer, their- upper 

 half upright and slightly curved backward (PI. I., fig. 7, PI. II. 

 fig. 15). Anal tube large, exserted, its teeth very short and obtuse. 

 2 • Pale brownish yellow, claws and apex of the saw-case 

 black. Elytra one-third shorter than abdomen. Length, male, 

 2f mm. ; female, 4 mm. 



Marshes, in June ; Abbey Wood and Brundall, 

 Norfolk. 



18. Liburnia adela, Flor. 



Delphax adela, Flor, Ehyn. Liv., ii., 63, 14 ; Fieb., 

 Grundz. Delph., t. 8, fig. 50 (^ genitalia). 



Liburnia adela, Scott, Ent. Mo. Mag., vii., 26, 16 ; 

 Fieb., Cicad. d'Enr., pt. iv., 54, 49. 



Brownish yellow, abdomen above black, with white hind margins 

 to the segments. Basal impressions of the crown deeper than the 

 apical. Face between the keels sometimes black, its central keel 

 sharp, nearly evanescent on the forehead. Elytra as long as the 

 abdomen, dirty brown, with a very narrow and indistinct pale 

 margin ; nerves strong, brown, distinctly granulate. Legs sometimes 

 with indistinct dark stripes. Pygofer (male) black, viewed from 

 behind, oval, widest in the middle. Upper notch deep, triangular, 

 margined with white, viewed fi-om the side its margin forms a very 

 obtuse angle with the hind margin of the pygofer, which is 

 angularly prominent in the middle ; lower notch deep, narrow, 

 somewhat sinuate. Styles long, strap-shaped, reaching about two- 

 thirds the height of the cavity, oblique at the base, afterwards 

 upright and slightly incurved towards their truncate apex, inner 

 margin sinuate, inner apical angle produced into a blunt tooth. 

 Anal tube whitish, scarcely exserted, its teeth short and blunt. 

 Length, 2^ mm. 



Female undescribed. 



