° 
120 Psyche [August 
Ferruginous red; gaster slightly paler; frontal area, and in some specimens also 
the antennal clubs, infusecated; mandibular teeth black. 
Female: Length, 6.5-7.5 mm. 
Closely resembling the worker. Postpetiole in some specimens opaque rugu- 
lose, or with only the node smooth and shining. Mesonotum and scutellum sharply 
and regularly longitudinally rugose, the former with an anteromedian and a pair 
of parapsidal blackish streaks. Wings grayish hyaline; veins pale brown, stigma 
dark brown. 
Male: Length, 6-7 mm. 
Head, including the eyes and excluding the mandibles, distinctly broader than 
long, rounded behind. Mandibles similar to those of the worker, with two large 
apical and numerous minute basal teeth. Clypeus very convex, with entire an- 
terior border. Antenne slender; scapes very short, not longer than the second 
funicular joint; which is three times as long as the first and of the same length as 
the succeeding joints. There is no differentiated club. Thorax rather small, 
narrower than the head through the eyes, with very distinct Mayrian furrows. Scu- 
tellum convex, epinotum, petiole and postpetiole much as in the worker. Gaster 
more slender, with the genital appendages proportionally larger and more exserted 
than in M. rubida. 
Shining; head opaque, indistinctly punctate and longitudinally rugulose; thorax 
subopaque, more shining above, longitudinally rugose-punctate even on the epino- 
tum. Sides and ventral portions of petiole finely and densely punctate. 
Hairs much as in the worker but more delicate and flexuous. 
Black; dental borders of mandibles, tibiz and tarsi brown or sordid yellowish; 
gaster red, often brownish in the middle above; base of first segment sometimes 
black or all of the gaster, except the base of the first segment, black. In other 
specimens the postpetiole is red. Wings colored as in the female. 
Colorado: Denver; type locality (Theo. Pergande); Colorado 
Springs, Salida, Buena Vista and Wild Horse, 6000-7000 ft. 
(Wheeler); Canyon City (Rev. P. J. Schmitt). 
New Mexico: (Ern. André.). 
Utah: Salt Lake County (R. V. Chamberlin), as the host of the 
peculiar xenobiotic ant, Symmyrmica chamberlini Wheeler. 
Washington: Olympia (T. Kincaid); Ellensburg and Pullman 
(W. M. Mann). 
Alberta: McLeod (C. G. Hewitt). 
British Columbia: Dog Lake, Penticton (C. G. Hewitt). 
Myrmica (Oreomyrma) bradleyi Wheeler. (Fig. 1 c.) 
Myrmica bradleyi Wheeler, Journ. N. Y. Ent. Soc. XVII, 1909, p. 77, 8. 
Myrmica (Oreomyrma) aldrichi sp. nov. (Fig. 1 b.) 
Worker: Length 5-6 mm. 
Head subrectangular, a little longer than broad, with nearly straight sides and 
posterior border and rounded posterior corners. Mandibles and antenne as in 
