327 N. C. AGR. EXP. STA. BUL. 239 
open basally, without an anteapical plexus of veins, with supernumerary ante- 
apical cross veins to costal margin, texture coriaceous, without sculpturing. 
Female unknown. Hindwing with vein R243 entire. Hindleg with femoral setal 
formula 2:0:0; tibiae scarcely flattened, macrosetae of row 1 widely separated 
except near apex, of row 2 widely separated and without intercalary macro- 
setae, first tarsomere with length about equal to combined length of second 
and third tarsomeres and with biseriate short setae on plantar surface. 
Male genitalia: Pygofer moderately produced, with sparse microsetae on 
posterior third, with an anteapical undifferentially sclerotized dorsal process ex- 
tending mesad, its posterior margin and posterior pygofer margin with a number 
of short denticulate projections. Plates triangular, separate throughout their 
length, gradually narrowed apically, not extending as far posteriorly as pygofer 
apex, each with numerous multiseriate short microsetae. Style extending much 
farther posteriorly than apex of connective, without preapical lobe, gradually 
narrowed in posterior half to acute apex which is directed slightly mesad. Con- 
nective short Y-shaped with arms widely divergent, strongly keeled. Aedeagus 
symmetrical, attached to base of anal tube, not articulated with connective, slen- 
der, with a pair of dorsal triangular projections near midlength, apex curved dor- 
sally. Paraphyses absent. Female unknown. 
Backhoffella is known only from the type-species which is rare in collections 
and known only from Peru. The genus is close to the Proconiini in its facial 
characters, in the complete vein R2,3 of the hindwing and in the microsetae 
on plates and pygofer. It has the cicadelline character of the hind knee at- 
taining the posterior proepimeral margin when at rest. The male genitalia are 
similar in many respects to species of Punahuana, new genus, but Backhoffella is 
much larger and Punahuana has macrosetae on the male pygofer and plates. 
My identification of B. pulchra is based on a study of the male lectotype. 
50. Genus DIEDROCEPHALA SPINoLA 
FiGuRES 262-265 
Diedrocephala Spinola, 1850a:57. Type-species. Cicada variegata Fabricius, by monotypy. 
Length of male 6.2-9.5 mm, of female 7.2-7.9 mm. 
Head well produced, median length of crown from eight-tenths of, to one- 
fourth greater than (usually from nine-tenths of, to one-fourth greater than) 
interocular width and from slightly less than one-half to two-thirds (usually 
from slightly more than one-half to two-thirds) transocular width, anterior 
margin narrowly rounded in dorsal view, with a carina at transition from 
crown to face, ocelli located behind a line between anterior eye angles, each 
closer to median line than to adjacent anterior eye angle, crown concave, at 
least in middle of disk, with a median longitudinal fovea (exception: D. 
euthemis, n. sp.) and with faint striae at least on ocellocular area, lateral 
clypeal sutures extending onto crown and attaining ocelli; antennal ledges not 
protuberant, in lateral view with anterior margins rectilinear and vertical or 
slightly oblique; clypeus convex, not tumid, muscle impressions distinct, face 
