CICADELLINAE: PART 2. NEW WORLD CICADELLINI 285 
40. Genus ONEGA DIstTANT 
FiGuRES 232-236 
Onega Distant, 1908a:528. Type-species: Onega avella Distant, by original designation. 
Length 13.3-16.8 mm. 
Head moderately produced, its median length varying from slightly more 
than one-half of to slightly greater than interocular width and from approx- 
imately one-third to slightly more than four-tenths transocular width, anterior 
margin with a carina at transition from crown to median portion of clypeus, 
ocelli located on a line between anterior eye angles, each slightly closer to me- 
dian line of crown than to adjacent anterior eye angle, surface of crown dis- 
tinctly concave behind apex (markedly concave in Onega avella Distant and O. 
fassli, n. sp.), and concave laterad of each ocellus, the concave portions con- 
fluent or not (OQ. stipata (Walker)), lateral clypeal sutures extending onto 
crown but not attaining ocelli; antennal ledges with anterior margins short 
and usually strongly convex in lateral view; face with clypeus flattened to 
strongly concave, muscle impressions distinct (exception: O. bracteata, n. sp.), 
transclypeal suture obsolete, with weak pubescence on clypellus. 
Pronotum wider than head, lateral margins convergent anteriorly, dor- 
sopleural carinae complete, posterior margin concave (exception: some 
specimens of bracteata), disk without pubescence, usually without distinct 
_ sculpturing (irregularly, weakly punctate in avella); scutellum with posterior 
portion swollen, without sculpturing. Forewing with or without a membrane, 
veins usually not elevated (exception: clavus of avella), distinct or not, with 
four apical cells of which base of fourth is more proximal than base of third, 
with or without an anteapical plexus of veins (varying interspecifically), tex- 
ture translucent to coriaceous, wings of female at rest exceeding apex of 
ovipositor. Hindleg as in genus Paromenia Melichar. 
Male genitalia: Male pygofer moderately to strongly produced, with setae 
of uniform or mixed sizes, the chaetotaxy specific, pygofer processes present or 
absent. Plates variable interspecifically, not fused basally, with uniseriate 
macrosetae. Style extending posteriorly to or beyond apex of connective, apex 
variable interspecifically. Connective variable between species, strongly 
carinate. Aedeagus with shaft elongate, curved dorsally or not, narrowed 
apically or with paired apical processes. Paraphyses usually absent (present as 
a median sclerite in /fasslz). 
Female (unknown in stella Distant and bracteata) abdominal sternum VII 
and ovipositor second valvulae as in Paromenia Melichar. Pygofer not strongly 
produced, apex strongly convex, macrosetae greatly variable in number and 
located before apex and near posteroventral margin. 
Specimens of Onega have been examined from Colombia to Bolivia. Onega is 
closely related to the genus Paromenia Melichar from which it may be 
separated readily by the carina at the transition from crown to clypeus, and 
the concavity on the crown behind the apex in Onega. The facies of species of 
Onega, except for bracteata, differ from Paromenza. 
