British Homoptera-Cicadina. 19 
ii. AcocrpHatus, Germ. (PI. III, fig. 6). 
Germar, Silb. Rev., i., 181, 46 (1833). 
Crown obtusangularly produced in front, more or less broadly 
excavated (in the subgenus Anoscopus, Kbm., slightly convex) ; 
in the male sometimes, and in the female generally, tricarinate. 
Ocelli on the front margin of the crown a little nearer to the eyes 
than to the apex. Submarginal wing-nerve incomplete. 3: 
genital valve wanting; plates narrow, reflexed, connivent, sub- 
navicular ; lower angle of pygofer with a blunt semicircular tooth ; 
penis strap-shaped, barbed at the apex and in the middle (albi- 
frons). Sexes very dissimilar. 
TaBLE OF SPECIES. 
(6). Crown more or less broadly excavated. 
(5). Excavation of crown very strong. 
(4). Elytra not banded with white .. L. nervosus. 
(3). Elytra with white bands. Crown one- 
third or more than one-third ee 
than pronotum.. é 2. bifasciatus. 
5 (2). Excavation of crown very bebe. cage 
not or very little toneer than BAS 
notum .. c . 3. albifrons. 
6 (1). Crown slightly convex, nee ented 
7 (8). Elytra dark pro with broad white 
bands .. . 4. brunneo-bifasciatus. 
8 (7). Markings of elt feHettuciiall 
9 (10). Elytra whitish hyaline, with the nerves 
and a band near the apex black .. 5. histrionicus. 
10 (9). Nerves of elytra pale, interstices black 6. flavostriatus. 
Pe wODN 
The foregoing table applies only to the males; the 
characters of the females will be found in the detailed 
descriptions which follow :— 
1. Acocephalus nervosus, Schrank. 
Cicada nervosa, Schr., Enum. Ins. Austr., 256, 481. 
Acocephalus cardut, obscurus, sparsus, unicolor, fasciatus, 
pallidus, and bicinctus, Curt., Brit. Ent., 620, 
1—8. 
Acocephalus adustus, Hardy, Tr. Tyne. F. C., i., 429, 1. 
A. rusticus, H.-Scff., Deuts. Ins., 124,15; Flor, Rhyn. 
Liv., u., 199, 1; Marsh., Ent. Mo. Mag., ii., 145, 
1; Kirschb., Cicad., 75, 4; J. Sahl., Not. Fenn., 
li., 356, 1; Sign., Ess. Jass., 16, 1, pl. 1, fig. 6. 
&. Upper side lighter or darker brown, a band across the 
crown, a band across the pronotum, and a narrow stripe near the 
cQ2 
