WHEELER: ANTS OF THE GENUS FORMICA. 527 
111. F. crner&a PILicornis Emery. 
F. fusca var. cinerea Mayr, Verh. Zool. bot. ver. Wien, 1886, 36, p. 427, 8. 
F. pilicornis Emery, Zool. jahrb. Syst., 1893, 7, p. 664, 8 @ o. 
WorkeER. Length 3-7 mm. 
Thorax and petiole very much as in the typical cinerea; but in large 
workers the pro- and mesonotum are very convex and rounded. 
Petiole rather narrow, thick, with blunt, entire or feebly emarginate 
superior border. 
Body, including the frontal area, opaque; mandibles densely stri- 
ated and coarsely punctate. 
Hairs silvery white, short, pointed, more abundant than in the 
typical cinerea, covering not only the whole body, but also the scapes, 
legs, and eyes. Pubescence silver gray, very dense and longer than 
in cinerea, uniformly investing the head, thorax, and gaster, much 
shorter on the legs and scapes. 
Brownish red; mandibles darker, tips of funiculi, posterodorsal 
portion of head and dorsal portion of gaster dark brown, but appearing 
gray on account of the dense pubescence. 
FremMaLe. Length 8-10 mm. 
Closely resembling the worker in sculpture, pilosity, and color. 
Three large spots on the mesonotum, the scutellum, metanotum, 
and sometimes also the pleurae and base of epinotum infuscated. 
In some specimens the mesothoracie spots become confluent so that 
the whole dorsal surface of the thorax is fuscous. Wings colorless, 
with pale yellow veins and darker stigma. 
Mae. Length 8-9 mm. 
Very similar in color, sculpture, and pilosity to the male of the 
typical cinerea, but the scapes have sparse, erect hairs on their anterior 
surfaces and the eyes are hairy. ‘The upper surface of the gaster is 
also sparsely hairy. Body, including mandibles and antennae, black; 
genitalia and legs yellow; in some specimens the middle portions of 
the femora are deeply infuscated. Frontal area opaque. Wings as 
in the female. 
TYPE LocaLity.— California. 
California: San Jacinto, Tres Pinos (Th. Pergande); Mount 
Pinos (F. Grinnell Jr.); Point Loma, San Diego County (P. Leonard 
and Wheeler); Arroyo Seco at Pasadena, Lakeside (Wheeler); Es- 
condido, San Diego County (J. C. Bradley); Claremont (C. F. Baker); 
Lake Merced, near San Francisco (F. X. Williams). 
This beautiful ant was described as a distinct species by Emery, 
but it is really only a very pilose subspecies of cinerea, peculiar to the 
