British Homoptera-Cicadina. 47 
4. Deltocephalus citrinellus, Kbm. 
Deltocephalus citrinellus, Kirschb., Cicad., 184, 100; 
J. Sahl., Not. Fenn., xii., 884, 25. 
Jassus cephalotes, H.-Scff., Deuts. Ins., 125, 6. 
Deltocephalus cephalotes, Ferrari, Cicad. agri. Ligust., 
Tag 49. 
D. assimilis, Fieb., Syn. Eur. Delto., 16, 48, fig. 41; 
Scott, Ent. Mo. Mag., xii., 248, 7. 
D. brachynotus, Fieb., 1. c., 19, 55, fig. 55. 
Oblong-ovate. Upper fore parts greenish yellow, elytra pale 
greyish green, breast black. Crown subequal in length to its 
width at the base, nearly twice as long in the middle as at the 
sides, free sides nearly straight, angle blunt; interocellar line 
when present fuscous. Frons pale brown, with a middle stripe 
and the usual side lines yellow. Pronotum about one-third shorter 
than the crown. Elytra whitish hyaline at the apex, a little 
longer than the abdomen, costa rounded, apex widely rounded; 
nerves stout, yellow, inner apical areas and those adjoining some- 
times narrowly margined with fuscous. Legs yellow, striped and 
spotted with black. ; abdomen black; genital plates very 
small, separately rounded, scarcly half as long as the trapeziform 
valve. 2; abdomen black, with the sides more or less widely 
yellow; last ventral segment yellow at the sides or entirely yellow, 
its hind margin nearly straight. Length, 23—31 mm. 
Moderately common amongst grasses in damp places. 
5. Deltocephalus ocellaris, Fall. 
Cicada ocellaris, Fall., Hem. Suec., ii., 38, 13; Zett., 
Ins. Lapp., 291, 11. 
Jassus ocellatus, H.-Scff., Deuts. Ins., 129,11; Germ., 
Faun. Ins. Eur., xvii., 18. 
Deltocephalus ocellaris, Flor, Rhyn. Liv., ii., 237, 8; 
Marsh., Ent. Mo. Mag., i., 228, 2; Kirschb., 
Cicad., 141,115; Thoms., Opusc. Ent.,i., 72, 59; 
Riebs, Syn. Hur! Delto.;°5)'9, ‘fig. 93" F.. Sahle 
Not. Fenn., xii., 310, 7; Scott, Ent. Mo. Mag., 
xil., 275, 16; Ferrari, Cicad. agri. Ligust., 70, 4. 
Crown yellowish white with fulvous spots, in the male as long, 
in the female a little longer, than its basal width, about three- 
fourths longer in the middle than at the sides, free sides feebly 
arcuate, angle blunt. Frons blackish brown, sometimes with a 
large yellow patch on the apical half; side lines short, whitish. 
