CICADELLINAE: PART 2. NEW WORLD CICADELLINI 843 
four-tenths to slightly more than five-tenths transocular width, without a 
Carina at transition from crown to face, ocelli located on or before a line be- 
tween anterior eye angles, each ocellus closer to adjacent anterior eye angle 
than to median line of crown, crown convex and without a transverse con- 
Cavity across ocelli, without a median fovea, surface with lenticular impres- 
sions, lateral clypeal sutures extending onto crown and attaining ocelli; anten- 
nal ledges not protuberant, in lateral view with anterior margins oblique and 
convex; face without a vertical lenticular sclerite bordering lateral clypeal 
suture on each side below eye, clypeus strongly convex medially, median 
clypeal area punctate, muscle impressions distinct, transclypeal suture distinct 
throughout its length, clypellus not produced, its contour continuing profile of 
clypeus. 
Thorax with pronotal width less than transocular width of head, lateral 
margins parallel, dorsopleural carinae not distinct, posterior margin concave, 
disk transversely rugose and with or without punctures; scutellum transverse- 
ly striate behind transverse sulcus. Forewing without a membrane, veins 
elevated and distinct, with three closed anteapical cells all of which have their 
bases proximal to a transverse line drawn through claval apex, with four 
apical cells, the base of the fourth more proximal than base of third, without 
an anteapical plexus of veins; forewings of female in rest position exceeding 
apex of ovipositor. Hindleg with femoral setal formula 2:1:1 or 2:1:0; length 
of first tarsomere less than combined length of two more distal tarsomeres, 
and with two parallel rows of small setae of two sizes on plantar surface. 
Male genitalia: Pygofer moderately produced, apex very broadly rounded, 
with a number of microsetae and a few very small interspersed macrosetae on 
most of surface, pygofer processes absent. Plates triangular, not extending 
posteriorly as far as pygofer apex, with a few microsetae not arranged in rows. 
Style extending posteriorly as far as apex of connective, narrowly rounded 
apically, with a slight lateral lobe at midlength. Connective Y-shaped with 
arms narrow and widely divergent. Aedeagus with dorsal apodemes wide and 
strongly divergent, shaft without processes, gonopore ,anteapical on caudal 
margin. Paraphyses paired, asymmetrical, but of almost equal length. 
Female of type-speces unknown (see fig. 681 of D. curta (Beamer)). 
Species of Decua Oman are known to occur in Arizona and New Mexico. 
Decua Oman belongs to the /sogonalia complex of genera (p. 819). In D. curta 
(Beamer), the female has only microsetae on the pygofer, but with second 
valvulae of the ovipositor and with abdominal sternum VII as in Campecha 
Melichar and Amphigonalia, new genus. In the paraphyses of the male, the 
degree of asymmetry is less pronounced than in many species of Graphocephala 
Van Duzee, or in Campecha. The reduced number (6 in the few specimens 
studied) of setae in posterior tibial row 2 is rare in the generic complex, even 
in small species. The antennal ledges are punctate in Decua; rugose in other 
genera in the complex. 
In the original description of Decua cucurbita, Ball stated that it occurred on 
Cucurbita digitata. Beamer stated that D. curta occurred in grass in his original 
description. 
