British Homoptera-Cicadina. 27 
- S. Deep yellow; the disc of the crown, the pronotum, and an 
angularly-bisinuate stripe narrowly white on its outer edge and 
occupying the inner half of each elytron, chocolate-brown, finely 
speckled with yellow; along the suture, and in the base of the 
apical and the apex of the subapical areas, a few (about nine) small 
round white spots ; abdomen above widely black down the middle. 
Crown as long as the pronotum, distinctly longer than its width 
between the eyes. Elytra parallel-sided, their apex truncate, with 
rounded angles. Genital valve subequilaterally triangular, plates 
about twice as long as the valve, subnavicular, rather abruptly 
reflexed about the middle, acuminate at the apex. 
@. Similar in colour to the male, but the crown is distinctly 
shorter than its width between the eyes. Last ventral segment 
about one-half longer than the preceding, the subquadrate middle 
lobe of its hind margin bounded on each side by a deep angular 
notch, and having its hind angles produced into a spine, and a 
small notch in the middle of its hind margin. Fieber’s figure 
(Syn. Eur. Delt., t. 6, fig. 64, £) does not represent the last ventral 
segment of this species. Length, 5—6 mm. 
On Pteris; Cann Quarry, Bickleigh Vale (Scott, 1882). 
v. GrapHocrmRus, Thoms. (Pl. IIL, fig. 2). 
Thomson, Opuse. Ent., i., 57 (1869). 
Crown subangularly produced, impressed on each side at the 
base, reflexed at the apex. rons convex, slightly impressed 
above. Pronotum separated from prosternum by a ridge. Elytra 
subopaque, with one transverse nerve. Wings of the Jassid type. 
3: Genital valve present; plates wide, convex, subvertical, 
diverging behind ; lower angle of pygofer strongly acuminate. 
1. Graphocrerus ventralis, Fall. 
Cicada ventralis, Fall., Act. Holm., 18, 9 (1805); 
Hem. Suec., ii., 31, 9. 
Athysanus ventralis, Flor, Rhyn. Liv., ii., 277, 3: 
Kirschb., Athys. Art., 18, 17; Cicad., 122, 76. 
Graphocrerus ventralis, Thoms., Opuse. Ent., i., 57, 
25; J. Sahl., Not. Fenn., xii., 289, 1; Scott, Ent. 
Mo. Mag., xii., 25. 
Greenish yellow; a point above the base of each antenna, a pair 
of points on the apex of the frons, a row of four equidistant points 
across the crown, and four points on the pronotum, one behind 
each eye and a pair in the middle near the front margin, black; 
