WHEELER, NORTH AMERICAN ANTS 309 



which are more scattered on the posterior corners. Posterolateral borders of 

 clypeus, Inner borders of frontal carinse, the pro- and mesonotum with a few 

 piligerous foveolse. 



Hairs much as in sansabeatiiis, even on the cheeks. 



Black ; thorax, petiole and base of gaster slightly reddish ; insertions and 

 tips of scapes, funiculi and legs deep reddish brown ; posterior borders of 

 gastric segments sordid yellowish. 



Wor-ker minor. Length, 5-7 mm. 



Differing from the minor worker of sansaheanus in the shorter and broader 

 head ; with more prominent anterior corners, the shorter and basally more 

 dilated antennal scapes. 



Body more shining than in the worker major. Pilosity and color as in this 

 phase, but mandibles, clypeus, cheeks and scapes deep red and legs sometimes 

 more yellowish. 



Female. Length, 13-15 mm. 



Resembling the major worker, but head longer than broad and thorax and 

 gaster more shining. Black ; mandibles, funiculi, femora and tibiae deep red- 

 dish brown ; venter and sides of two basal gastric segments blotched with 

 brownish yellow ; trochanters and tips of coxte of the same color. Wings 

 strongly tinged with brown ; veins and stigma pale brown. 



Male. Length, 7-8 mm. 



Resembling the male of sansaheanus, but the head and thorax somewhat 

 more opaque. Hairs dirty yellow, rather abundant on the cheeks, which are 

 somewhat broader in front than at the eyes. Black ; funiculi and tarsi light 

 brown. Wings somewhat paler than in the female. 



Described from a number of specimens of all four phases from a single 

 colony found by C. E. Biederman nesting in the ground under a stone at 

 Palmerlee, Arizona, (5500 ft.) and several workers and males taken by 

 W. M. Mann in Eamsey Canyon, Hnachuca Mts., (5800 ft.) in the same 

 territory.* 



This form is readily distinguished by the shape of the head, short 

 antennal scapes and the combination of the characters of the antennae of 

 maccooJii with the thickset stature of sansaheanus and the coloration of 

 the darkest forms of vicinus. It deserves a higher rank than as a mere 

 variety of sansaheanus. 



12. C. maculatus ocreatus Emery 



C. maculattis subsp. ocreatus Emery, Zool. Jahrb. Abth. f. Syst, VII, p. 673, 

 ^, 1893; Ibid.. VIII, p. 336, 1894. 

 C. maculatus race ocreatus Pergande. Proc. Calif. Acad. Sci., (2) IV. p. 26, 



^ , 1893. 



* During November, 1910, I found this ant very common under stones in MiUer Can- 

 yon, Iluachuca Mts., Ariz., between 5000 and 6000 ft. 



