460 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Host. Unknown; probably one of the subalpine varieties of F. 
fusca. 
TYPE LOCALITY.— Colorado: Woodland Park, Ute Pass, 8,500 ft. 
(Wheeler). . 
Colorado: Buena Vista, Boulder, Wild Horse, Salida, Florissant 
(Wheeler). 
New Mexico: Embudo (T. D. A. Cockerell). 
The female of this species is readily distinguished from the female of 
criniventris and ciliata by its pilosity and from the females of all the 
other species described above by its color and the erect hairs on the 
antennal scapes. This last character also enables one to separate | 
the worker from the very similar workers of all the foregoing species 
of the rufa group. 
There can be little doubt that this ant is a temporary parasite on 
some form of F. fusca. The nests which I saw in the localities re- 
corded above during the summer of 1903 and 1906 were not abundant 
but were very populous. They were established in open, sunny places, 
under stones, the edges of which were heavily banked with vegetable 
detritus. 
48. EF. orneas Wheeler var. COMPTULA, var. nov. 
WorkKER. Length 3-7 mm. 
Differing from the worker of the typical oreas in color and pilosity. 
The red portions of the body are darker and less yellowish, the gaster 
blacker, the legs dark brown, or nearly black, with red articulations. 
In small workers the vertex, upper surface of thorax and petiole are 
rather heavily infuscated. The erect hairs on all parts of the body, 
especially on the head, are somewhat more abundant; the hairs on the 
gaster though very numerous are only half as long as in oreas, and as 
the pubescence is shorter and sparser on this region, it appears blacker 
and less glaucous. 
FEMALE (DEALATED). 7.5-8 mm. 
Differing from the female of the typical oreas in having the white 
hairs covering the body, scapes, and legs conspicuously more abundant 
and somewhat coarser. On the legs and scapes the hairs are more 
erect, and they are very dense on the epinotum, petiole, and upper 
surface of the gaster. 
Described from two females and ten workers taken by Mr. Wm. M. 
Mann from a large colony at Pullman, Washington. Mr. Mann has 
also taken workers and females of this variety at Elkhorn, Montana. 
