CICADELLINAE: PART 2. NEW WORLD CICADELLINI 725 
94. Genus BALACHA MeELIcHAR 
Ficures 593, 594 
Balacha Melichar, 1926a:343. Type-species Tettigonia melanocephala Signoret, by subse- 
quent designation of China, 1938d:184. 
Length of male 6.8-8.7 mm, of female 8.8-9.8 mm. 
Head moderately to strongly produced, median length of crown from 
slightly more than six-tenths to slightly more than eight-tenths interocular 
width and from slightly more than four-tenths to slightly more than one-half 
transocular width, anterior margin varying from broadly rounded to sub- 
angulate in dorsal view, without a carina at transition from crown to face, 
ocelli located on or behind a line between anterior eye angles, and variable 
interspecifically in location with respect to relative distance from median line 
and adjacent anterior eye angle, crown with a transverse concavity before 
ocelli and a median fovea extending from the concavity to hind margin, sur- 
face without sculpturing or setae, lateral clypeal sutures extending onto crown 
and attaining ocelli; antennal ledge not protuberant, in lateral view with an- 
terior margin rectilinear and slightly oblique, not carinate dorsally; clypeus 
flattened, muscle impressions not very distinct, transclypeal sulcus almost 
always entire, clypellus not strongly produced but in profile with its ventral 
portion curved more posteriorly than remainder of face. 
Thorax with pronotal width less than transocular width of head, lateral 
margins parallel, dorsopleural carinae complete, posterior margin concave, 
disk transversely rugose, not pubescent; scutellum transversely striate behind 
transverse sulcus. Forewing without a membrane, veins not distinct, with four 
apical cells, base of fourth more proximal than base of third, without an an- 
teapical plexus of veins, texture coriaceous and without sculpturing; fore- 
wings of female in rest position exceeding apex of ovipositor. Hindleg with 
femoral setal formula 2:1:1; length of first tarsomere greater than combined 
length of two more distal tarsomeres and with two parallel rows of small setae 
on plantar surface. 
Male genitalia: Pygofer moderately produced, posterior margin broadly 
convex, with a convexity at base of posteroventral margin, with macrosetae on 
posterior portion only (B. melanocephala (Signoret)) or extending antero- 
ventrally almost to base. Plates fused basally or not, slender, triangular, 
rounded apically, not extending posteriorly as far as pygofer apex, each with 
numerous macrosetae or mixed macro- and microsetae extending from near 
base to or almost to apex. Style extending posteriorly much farther than apex 
of connective, without preapical lobe; connective triangular or in form of 
transverse bar, keeled; aedeagus symmetrical, curved at its base through 180°, 
shaft slender and with a pair of apical processes; paraphyses present or ab- 
sent. 
Female (unknown in B. distincta (Signoret)) abdominal sternum VII with 
posterior margin almost rectilinear, slightly and very broadly convex. Dorsal 
membrane of genital chamber without sclerites. Ovipositor with second 
valvula narrow in basal one-third of portion beyond basal curvature, remain- 
der expanded dorsally and bearing large quadrate primary teeth, each bearing 
