1915.] Wheeler, Additions to the Ant-Fauna of North America. 411 
more shining. The hairs on the body are less abundant, those on the gula longer 
and forming a more distinct psammophore. The whole body is ferruginous red, 
except the middle portions of the femora and tibie and the gaster posterior to the 
middle of the first segment. These regions are dark brown or blackish. Mandibular 
and clypeal borders black. 
Described from 18 workers taken by Dr. R. V. Chamberlin oo Santa 
Cruz Island, off the coast of Southern California. 
30. Aphenogaster subterranea valida subsp. nov. 
Worker. Length: 4-5.5 mm. | 
Differing from the subsp. occidentalis Emery in the more robust build of the large 
workers, the broader head, slightly shorter antennal scapes, heavier sculpture and 
much darker color. The rugosity and punctuation of the head, pleuree and epinotum 
are much coarser, so that these parts and especially the epinotum are subopaque. 
The occiput and dorsum of the pro- and mesonotum are shining, but the mesonotum 
is distinctly shagreened (smooth in occidentalis). The epinotal spines are somewhat 
longer and stouter than in this subspecies. The head, thorax, petiole and gaster are 
deep chestnut brown, the legs and articulations of the tarsi, the neck, clypeus, frontal 
caring, antennez, mandibles and sutures of the thorax deep red; middle portions of 
the femora and tibize somewhat darker. 
Female. Length: 6-6.5 mm. ! 
Differing from the female of occidentalis only in the somewhat broader and more 
rectangular head, slightly shorter antennal scapes and darker color. In both sub- 
species the mesonotum and scutellum are very smooth and shining, and the wings 
are long and hyaline, with pale yellow veins and brown stigma. 
Male. Length: 4-5 mm. 
Indistinguishable from the male of occidentalis except in the slightly darker and 
more blackish color of the body and the more distinctly shagreened though scarcely 
less shining mesonotum. Wings colored as in the female. 
Described from seven females, five males and numerous workers taken 
from two colonies in Cheyenne Cafion, near Colorado Springs, Colo. These 
colonies were very populous and were nesting under huge stones, and one 
of them was beginning its nuptial flight when I came upon it. There is a 
distinct tendency to polymorphism in the worker caste, the smaller indi- 
viduals closely resembling the only worker phase of the subsp. occidentalis. 
The colonies of the latter are very small compared with those of valida. I 
have compared this form with topotypes of occidentalis taken by Mr. W. M. 
Mann at Pullman, Washington and with long series of specimens from other 
localities in that state, Oregon, California, Utah, Colorado, Idaho and 
Montana. 
