150 Psyche [October 
ners. Eyes rather small and flat, elliptical, just in front of the median transverse 
diameter of the head. Mandibles convex, with five subequal teeth. Clypeus 
short, feebly convex, its anterior border strongly bidentate, arcuately excised be- 
tween the teeth, sinuate laterally. Frontal area distinct, with a median carinula. 
Antennal scapes reaching less than half the distance between the eyes and posterior 
corners of the head; funicular joints 2-10 scarcely longer than broad. Thorax 
short, but little longer than the head without the mandibles, broadest through the 
pronotum, somewhat compressed behind; in profile the dorsal outline is usually 
convex and evenly rounded as far back as the boundary between the epinotal base 
and declivity. These meet at an obtuse angle, the declivity being shorter than 
the base, descending perpendicularly and forming a right angle on each side with 
the metasternal angle which is sharp and rectangular in profile. There are no traces 
of spines or teeth on the epinotum. Petiole with a slender, laterally compressed 
peduncle which is nearly as long as the node and armed with a distinct anteroventral 
tooth; node compressed anteroposteriorly and rounded in front, slightly overarch- 
ing the peduncle, with which its straight or slightly concave anterior surface forms 
at least a right angle and in some specimens even an acute angle in profile; seen 
from above the posterior surface is subelliptical, nearly twice as long as broad, and 
with rounded and not acute anterior border. Postpetiole campanulate, a little 
broader than the petiole, broader behind than in front, in profile very convex both 
dorsally and ventrally. Gaster elliptical, smaller than the head. Legs well devel- 
oped. 
Body, but especially the mandibles and gaster, shining. Mandibles very coarsely 
longitudinally striated. Clypeus and head covered with coarse longitudinal ruge, 
subparallel on the head and diverging only very slightly from the median line and 
not till they reach the occiput. Interrugal spaces reticulate and feebly punctate. 
Anterior depressed portion of pronotum transversely rugulose; remainder of pro- 
notum, the mesonotum and pleure coarsely and longitudinally reticulate-rugose. 
Ruge on the epinotum finer and transverse. Petiolar peduncle smooth and shining, 
posterior surface of node coarsely longitudinally reticulate-rugose. Postpetiole 
subopaque, finely and densely reticulate-punctate. Upper surface of gaster with 
sparse piligerous foveole, which are somewhat more closely aggregated near the 
anterior margin of the first segment. Legs very finely shagreened with small, sparse, 
piligerous punctures. Antennal scapes longitudinally rugulose. 
Hairs pale yellow, stiff, pointed, erect, varying in length, generally distributed 
over the body and appendages. Ammochete on clypeus, ventral surfaces of mandi- 
bles and gula long, but on the gula forming only a small psammophore, 7.e., the 
long hairs surround only the anterior portion of the gula and do not enclose the 
whole of it as in most species of Pogonomyrmex sens. str. 
Color deep red, legs and base of first gastric segment slightly paler; teeth of man- 
dibles black; anterior border of clypeus, posterior border of first gastric segment 
and a transverse band on each of the remaining segments dark brown or blackish. 
Female (deilated). Length nearly 7 mm. 
Very similar to the worker. Rugosity of thorax finer and more regular. Gaster 
larger, with the black banding of the segments more distinct, but the punctures on 
the dorsal surface smaller and less foveolate. 
