1952 ] 
Creighton — Pogonomyrmex huachucanus 
79 
its tip. Antennal scapes, coxae, femora, tibiae and tarsi with 
numerous, somewhat finer, erect hairs. Erect hairs on the 
antennal funiculi numerous and fine and grading to pu- 
bescence on the terminal segments. 
Color : deep ferrugineous red to orange red, the mandibu- 
lar borders piceous brown. Edge of the first gastric seg- 
ment often marked with brown. 
Female: Length: head (mandibles excluded) 1.75 mm.; 
thorax 2.25 mm. ; overall length 7-7.5 mm. 
Cephalic sculpture very similar to that of the worker 
but with the longitudinal rugae at the center of the head 
finer and more regular. The interrugal sculpture is less 
pronounced than in the worker so that the entire head, 
especially the middle third, is more shining than that of 
the worker. Mandibles and antennal scapes as in the worker. 
Thoracic rugae everywhere coarse and prominent except 
on the neck of the pronotum and the declivious face of the 
epinotum. The neck of the pronotum is transversely rugu- 
lose at its anterior edge. Behind this rugulose area is a 
band of dense, though shallow, punctures interspersed with 
extremely delicate rugules which extends back to the 
coarse, reticulate rugae on the humeral angles. Rugae of 
the scutum highly variable. In some specimens transverse, 
in others longitudinal. Rugae of the scutellum usually long- 
itudinal. Mesothoracic sternite and episternite longitudin- 
ally rugose, the rugae turning upward on the sides of the 
epinotum and becoming transverse on the basal face of the 
epinotum. Declivious face of the epinotum with two or 
three feeble, widely spaced rugae. Interrugal sculpture of 
the thorax like that of the worker but a little more feeble 
so that the thorax is slightly more shining than that of the 
worker. Sculpture of the petiolar nodes, gaster and legs 
like that of the worker. 
Erect hairs on the upper surface of the head, thorax, 
petiolar nodes and gaster slightly more numerous than 
those of the worker. Erect hairs elsewhere very similar 
to those of the worker. 
Color ferrugineous red, the masticatory margin of the 
mandibles and the lateral edges of the dorsum of the first 
gastric segment banded with piceous brown. 
