British Ilomoptera-Cicadina. 56 



Cixia nervosa, Burm., Ilanclb., ii., 157, 2. 

 Cicada muscceformis, Schr., Eiium., 253, 482. 

 Cixius nervosns, Sch;iff., F. G., 112, 22; Zett., Ins. 

 Lapp., 304, 1 ; Marsh., Eiit. Mo. Mag., i., 154, 1 ; 

 Scott, Ent. Mo. Mag., vii., 146, 2, tig. h, p. 1D3 

 (styles) ; Fieb., Cicad. cVEur., pt. ii., 176, 7. 

 Cixius minor, Kirschb., Cicad., 47, 3. 

 Head and face as in cnnicvlarivs, pronolnm brownish yeikiw 

 more or less suffused with black behind the eyes. Scutellum 

 black, keels sometimes brownish yellow. Elytra hyaline, with 

 faint traces of two fuscous bands, one (broad) at the base, and the 

 other (narrow) before the middle ; angular nerves and stigma 

 black ; some of the costal granules generally united. Legs brownish 

 yellow, sometimes suffused with darker. Length, 6 — 7 mm. 



Common. 



VI. DELPHACID^. 



Eyes reniform. Ocelli on the cheeks. Antennai of moderate 

 length, 2nd joint cylindrical, tuberculate. A large movable spur 

 at the base of the 1st joint of the hind tarsi. Tegula) small. 



Table of Genera. 



1 (4). Basal joint of antenna; much longer than 2nd. 



2 (3). Frons with two middle keels i. Asieaca. 



3 (2). Frons with one middle keel ii. Delphax. 



4 (1). Basal joint of antenna; much shorter than 2nd. 



5 (8). Frons with one middle keel. 



6 (7). Frontal keel entire or only forked on the fore- 



head . . . . . . . . . . . . iii. LiBURNIA. 



7 (G). Frontal keel forked much before the forehead iv. Dickanoteopis. 



8 (5). Frons with two middle keels v. SthvOMA. 



The genus Achoroiile, Fieb., has been considered as 

 British, but, as it seems to the writer, ui)on insufficient 

 evidence. The genus in question is characterised, inter 

 alia, by the possession of certain tubercles in the 

 channels between the sides of the frons and the middle 

 keels, a structure which is also found in the nymph of 

 Lihiirnia, and no adult insect presenting these facial 

 characters has yet been recorded as British. Scott 

 (Ent. Mo. Mag., vii., 196, 1) described Achorotile alho- 

 signata, Dahl., as British from a brachypterous male 

 received from Stnl on the strength of six nym])hs taken 

 by Dale, but there is nothing in his remarks to show 



