WHEELER: ANTS OF THE GENUS FORMICA. 441 
type and, according to my observations, are confined to pine woods 
and to higher altitudes. The queens were taken in the nests during 
the latter half of July. 
36. EF. TRUNCICOLA INTEGROIDES var. HAEMORRHOIDALIS Emery. 
F. rufa subsp. integra var. haemorrhoidalis Emery, Zool. jahrb. Syst., 1893, 7, 
p. 652, 8 ; Wheeler, Ants, 1910, p. 570. 
WorkKER. Length 4-9 mm. 
In structure, sculpture, and color like the preceding variety and the 
typical integroides, but differing from both in having no erect hairs 
on the head, thorax, petiole, and legs, with the exception of a few on 
the clypeus and the row of bristles on the flexor surfaces of the tibiae. 
Suberect hairs on the gaster sparse. The pubescence is the same as 
in the two preceding forms anid the gaster has the same appearance 
of being covered with a bluish bloom. Eyes hairless. Mandibles 
and frontal area rather shining. The small workers do not differ 
in color from the large ones. 
FEMALE. Length 9-10 mm. 
Similar to the female of coloradensis but lacking the erect hairs 
on the head, thorax, petiole, and legs and the dark spots on the thorax. 
Wings grayish hyaline, infuscated towards the base, with brown veins 
and stigma. 
Mate. Length 8 mm. 
Mandibles rather broad, edentate. Petiole thick, but with a com- 
pressed, thin margin, broadly excised in the middle. 
Head and thorax opaque; gaster glossy; frontal area slightly shin- 
ing. Body and legs covered with grayish pubescence which is longest 
on the thorax and gaster. The erect hairs are very short, but moder- 
ately abundant on the head, thorax, and gaster. Tibiae with short, 
scattered, suberect hairs. 
Head, thorax, gaster, and antennae black; tips of mandibles, geni- 
talia and legs testaceous or yellowish, femora and tarsi more or less 
infuscated. Wings as in the female. 
TYPE LOCALITY. — Colorado. 
Colorado: Florissant 8,100 ft., Woodland Park 8,500 ft., Ute Pass, 
Manitou, Garden of the Gods (Wheeler). 
Dakota (Emery). 
Idaho: Moscow Mts. (J. M. Aldrich). 
Nevada: Ormsby County (C. F. Baker). 
Washington: Yakima River opposite Ellensburg (S. Henshaw). 
This variety lives in the same localities and builds nests very similar 
