CICADELLINAE: PART 2, NEW WORLD CICADELLINI 957 
Color of dorsum, including forewings, black with numerous spots yellow to 
greenish-yellow, not forming a regular pattern nor larger yellow areas, the 
‘mottling of the crown continuing over clypeus and clypellus as a broad me- 
dian vertical stripe which is black at its edges; posterior margins of genae 
narrowly black, remainder of face yellow; pro- and metepisternum black, 
remainder of thoracic pleura yellow. 
Holotype male and fifteen additional specimens of both sexes. Bogota, 
Colombia (Lindig) (RMS). 
M. umbrosa, n. sp., is most closely related to M. contaminata (Fabricius) but 
differs in that it is definitely black marked with pale on anterior dorsum, 
whereas in the Fabrician species the proportions are so equally balanced that 
it would be difficult to say that they were either black marked with pale or 
pale marked with black. 
129. AMBIGONALIA, NEw GENus 
FIGURE 777 
Type-species: Tettigonia varicolor Signoret (1854a:15) 
Length 7.5-9.3 mm. 
Head slightly produced with anterior margin broadly rounded in dorsal 
view, median length of crown varying from slightly more than six-tenths to 
three-fourths interocular width and from slightly less than four-tenths to 
‘slightly less than one-half transocular width, without a carina at transition 
from crown to face, ocelli in line with anterior eye angles, each closer to ad- 
jacent anterior eye angle than to median line of crown, crown convex and 
without a transverse concavity, without a median fovea and without sculptur- 
ing or setae, lateral clypeal sutures extending onto crown and attaining ocelli; 
antennal ledges not protuberant, in lateral view with anterior margins ob- 
lique and rectilinear; clypeus slightly flattened medially, muscle impressions 
not very distinct, transclypeal suture obscure medially, clypellus with profile 
continuing contour of remainder of face. 
Thorax with pronotal width less than transocular width of head, lateral 
margins parallel, dorsopleural carinae incomplete, posterior margin concave, 
disk not sculptured, not pubescent. Forewing with membrane not clearly de- 
limited, veins not very distinct, with three closed anteapical cells of which the 
bases are almost in a transverse line with claval apex, with four apical cells of 
which base of outermost is more proximal than base of third; forewings of 
female exceeding apex of ovipositor. Hindlegs with femoral setal formula 
2:1:1, length of first tarsomere greater than combined length of two more dis- 
tal tarsomeres, and with two parallel rows of small setae on plantar surface. 
Male genitalia: Pygofer strongly produced, with apex convex, with nu- 
merous macrosetae on apical half and extending anteroventrally near ventral 
margin. Plates short triangular, with microsetae only. Style extending pos- 
teriorly as far as apex of connective, narrowly rounded apically, with a lateral 
lobe near midlength. Connective Y-shaped with arms widely divergent. 
Aedeagus short, expanded and membranous apically. Paraphyses_ short- 
Stalked, rami long, slender, and tapering to acute apices. 
