1974] 
Brown — Ant Genus Proceratium 
77 
of the gaster, the fusion of the mesonotal sclerites, and the small 
eyes, I doubt if this queen ever had flight-functional wings. 
Male (from 30 March colony) : TL 4.7, HL 0.76, HW (in- 
cluding eyes) 0.98, ML 0.29, scape L 0.64, greatest diameter of 
compound eye 0.40, WL 1.55, L petiole 0.55, W petiole 0.35, L hind 
tibia 0.93, L hind metatarsus 0.80, forewing 4.0 mm. 
Head with high-domed vertex set with 3 large, clear ocelli; com- 
pound eyes large and strongly bulging, with convex inner margins as 
seen in full-face view of head. Median lobe of clypeus projecting, 
broadly truncate. Frontal carinae parallel, low but sharp, vertically 
raised. Mandibles triangular, each ending in a stout curved apical 
tooth, masticatory borders curved and cultrate. Scapes overreaching 
posterior border of vertex. Palpi segmented, as far as can be seen in 
the undissected specimen, as in worker. 
Alitrunk with well-developed flight sclerites and wings; notauli 
lacking; scutellum semiglobose, protruding. Metanotum with the 
usual stout, acute median tooth. Propodeal dorsum short, convex, 
rounding obtusely into the declivity, which is indistinctly marginate 
on the sides. 
Petiole long and very low, with the highest part of the gently con- 
vex node near midlength, but the greatest width at about the posterior 
third. Postpetiole anteriorly wider than petiole, and widening still 
more posteriad, but not quite as wide as the succeeding segment, 
which is vaulted ventrad, but not as strongly as in worker and queen. 
Genitalia largely retracted (not dissected), but it can be seen that 
the parameres have thin, broadly rounded apices that are bent mesad 
toward each other. 
Legs long and slender, with the usual single pectinate spur on each 
middle and hind tibial apex, and the tarsal claw slender and simple. 
Wings of basic Proceratium pattern, with Rsf2-3 completely lack- 
ing in the forewing; m-cu also gone; the enlarged “cubital” cell 
receives only one free vein distally (Rsf5), because the apical free 
abscissa of M is gone. In the hind wing, the large cell receives a 
short remnant of Rs and the longer free apical abscissae of M and 
CuA; 1 A is missing beyond cu-a. Wings hyaline, with light brown 
veins. ( In the newly-discovered males of the related P. stictum — 
from Brookvale, Queensland, and P. goliath — from Zent, Costa 
Rica, the venation pattern is similar to that of avium , but darker in 
goliath , still paler in stictum ; m-cu is preserved in stictum, but in 
the hind wings of both, the free abscissa of Rs is reduced to obso- 
lescence. ) 
