WHEELER: ANTS OF THE GENUS FORMICA. 529 
low elevations on the slopes of the Coast Range in California. I have 
found great numbers of its colonies in the sandy bottom of the Arroyo 
Seco at Pasadena and in the sandy soil about the lake at Lakeside in 
El Cajon Valley. In the former locality it was living under large 
stones, in the latter it formed scattered crater nests, much like those 
of the typical cinerea in sandy portions of the Rhone Valley in Switzer- 
land. 
112. F. montana Emery. 
F. subpolita var. ? montana Emery, Zool. jahrb. Syst., 1893, 7, p. 663, 8. 
F. subpolita var. montana Wheeler, Ants, 1910, p. 571. 
WorkKeER. Length 4—-4.5 mm. 
Closely resembling F’. cinerea in shape, sculpture, and _pilosity. 
Head longer than broad, narrower in front than behind, with broadly 
rounded posterior corners and feebly convex sides. Eyes large. 
Clypeus rather bluntly carinate, its anterior border projecting, entire 
and broadly rounded. Frontal carinae diverging behind. Antennae 
moderately long, the scapes slightly enlarged at their tips; joints 
2-5 of the funiculus more slender and slightly longer than the penulti- 
mate joints. Maxillary palpi rather long. Pro- and mesonotum 
feebly convex, mesoépinotal constriction shallow, epinotum with sub- 
equal base and declivity, the former straight, forming a blunt obtuse 
angle with the very sloping declivity. Petiole rather narrow, slightly 
convex in front, flattened behind, the border not very sharp, seen from 
behind straight and transverse. Gaster and legs of the usual configu- 
ration. 
Opaque and very densely shagreened; mandibles striatopunctate, 
glossy. Frontal area slightly shining. 
Hairs pale yellow, abundant, erect, present on the dorsal and gular 
surface of the head, the thorax, petiole, and gaster; scapes and 
legs without erect or oblique hairs. Pubescence silvery white, very 
short, but rather dense, giving the head, thorax, and gaster a pruinose 
appearance. 
Pale reddish brown, posterodorsal portion of head, tips of mandibles 
and of funiculi somewhat darker. 
Typr LocaLity.— Nebraska: (Th. Pergande). 
Redescribed from one of the cotypes kindly given me by Professor 
Emery. At first sight this species seems to resemble F. bradleyi 
of the sanguinea group, but closer examination discloses many dif- 
ferences. The latter species has a differently shaped head, smaller 
eyes, a notched clypeus, a shining surface, and much sparser and 
longer pubescence. I am inclined to believe that montana is merely a 
