76 
Psyche 
[March 
around eyes often with darker pigment. Some specimens, presumably 
nearer to being callow, are lighter, more yellowish-ferruginous in 
general color. 
Malpighian tubules numbered 6 each in 4 live workers dissected, 
and 4 in a fifth worker, the last probably representing a mutilated 
specimen (dissected under less than ideal conditions). Not crypto- 
nephric. The count of 6 agrees with a worker of P. goliath dissected 
in Costa Rica. 
Queen, subergatoid (from 30 March colony) : TL 5.1, HL 0.90, 
HW 0.92 (Cl 102), ML 0.34 (mandibles slightly opened), scape 
L 0.83, greatest diameter of eye 0.14, WL 1.38, petiole L (from 
above) 0.57, petiole W. 0.58, L hind tibia 0.87, L hind metatarsus 
0.71 mm. Head as in worker, of the shape with transverse, only 
feebly convex posterior border in full-face view; sides converging 
slightly from behind eyes toward mandibles, and bulging again 
slightly at lateral ends of clypeus. Mandibles with 5 moderately 
strong teeth and a small offset basal tooth. Ocelli small but distinct; 
compound eyes nearly circular in outline, moderately convex, with an 
estimated 70 distinct ommatidia, relatively smaller than usual in 
Proceratium queens. Scapes just barely overreaching posterior border 
of head when laid straight back. 
Trunk somewhat reduced, but the usual sclerites of the ptero- 
thorax separated, except that the elements of the mesonotum are all 
indistinguishably fused into one gently convex continuous shield ; 
metanotum distinct but narrow, forming the usual acute median 
process, but in short compressed form. Propodeum with slightly 
raised, but bluntly rounded angles and slightly concave, submargined 
declivity. Wing stumps present and blackened, but small. 
Petiole shorter, broader and a little higher than in worker, the 
node rounded above and with a rather steep anterior face. Gaster 
much deeper and broader than in worker, extraordinarily volumi- 
nous, but undercurved as in worker. Sting present, stout, protrusible. 
Sculpture, color and pilosity much as in the worker over head, 
trunk and petiole, but the punctures here shallower, less distinct and 
sparser than in even the more weakly foveate workers; mesonotum 
and node with obsolescent foveae, almost completely smooth, shining. 
Gaster smooth and shining, without coarse punctures, but very finely 
and densely punctulate, with associated dense, short, appressed pu- 
bescence and a few short, delicate decumbent to erect hairs, mainly 
at the posterior borders of the first segment and on the undersurfaces, 
and becoming abundant near the gastric apex. Due to the great bulk 
