CICADELLINAE: PART 2. NEW WORLD CICADELLINI 167 
T. diagonalis, n. sp., can be distinguished externally from the other species in 
_ the genus by the distinctive markings at the apex of the forewings, in the male 
by the narrower aedeagal shaft than in the other species of which males are 
_ known, and in the female by the bases of the first valvulae which diverge from 
each other at an angle of 180° at their bases. 
19. WILLEIANA, NEw GENUs 
Figures 130-133 
Type-species: Tettigoniella vallonia Distant. 
Length 6.1-12 mm. 
Head slightly produced, median length varying from slightly more than 
four-tenths to slightly less than two-thirds interocular width and from slightly 
more than one-fourth to four-tenths transocular width, anterior margin 
broadly rounded in dorsal view, without 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, surface of crown concave 
medially, disk without sculpturing or setae, lateral clypeal sutures extending 
onto crown and attaining ocelli; antennal ledges in lateral view with anterior 
margins obliquely convex; face with clypeus flat or slightly concave medially 
and granulate or finely punctate, muscle impressions distinct, transclypeal 
suture distinct or not, clypellus not swollen, in profile continuing contour of 
clypeus, usually with fine setae on lower portion of clypeus and genae. 
Thorax with pronotal width less than transocular width of head, lateral 
margins parallel, dorsopleural carinae oblique, complete or not, posterior 
margin concave, surface without sculpturing or pubescence; posterior half of 
scutellum not transversely striate. Forewing with or without (W. vallonia (Dis- 
tant)) a membrane apically, veins not very distinct except in membrane, not 
elevated, with four apical cells and base of fourth more proximal than base of 
third (wing apices damaged in only specimen of W. maculoidea, n. sp.), 
without an anteapical plexus of veins, texture coriaceous except membrane; 
forewings of female at rest exceeding apex of ovipositor. Hindwing not much 
shorter than forewing and without an enlarged jugal lobe. Hindleg with 
meron not exposed with wings at rest, femoral setal formula 2:1:1, first tar- 
somere (unknown in maculoidea) with length greater than combined length of 
second and third tarsomeres, with biseriate small macrosetae on plantar sur- 
face. 
Male genitalia: Pygofer well produced and angular at apex, with numerous 
macrosetae on posterior half, and fewer near posteroventral margin, without 
processes. Plates not extending as far posteriorly as pygofer apex, narrowly 
triangular, separate throughout their length, abruptly narrowed near mid- 
length, with numerous uniseriate macrosetae from near base almost to apex. 
Style extending posteriorly beyond apex of connective, without a preapical 
lobe, narrowly convex at apex. Connective elongate Y- or T-shaped. Aedeagus 
symmetrical, without processes, broadest in its apical half. Paraphyses pre- 
sent, asymmetrical, the rami shorter than the stalk, slender, tapered, acute 
apically. 
