WHEELER: ANTS OF THE GENUS FORMICA. 405 
than in the typical sanguinea. Antennal scapes slender at the base, 
somewhat enlarged towards their tips. Head relatively large in large 
workers, almost broader than long, excluding the mandibles, with con- 
vex sides, rounded posterior corners and straight or feebly excised 
posterior border. Petiole broad, with sharp, entire or feebly excised 
superior border. | 
Sculpture a little finer than in the typical sanguinea; head and 
gaster more shining; punctures on the occiput rather distinct, scat- 
tered. 
Hairs yellowish, very sparse, usually absent on the thorax and 
petiole; short on the gaster. Pubescence shorter and more dilute 
than in the typical sanguinea, so that the surface, especially that of 
the gaster, appears more shining; very fine and appressed on the legs 
and scapes. 
Color brownish red like that of deeply colored specimens of the 
typical form; posterodorsal portion of head and often also the middle 
of thé pronotum infuscated or blackened. 
FEMALE. Length 7-8 mm. 
Sculpture, pilosity, and color as in the worker; metanotum, pos- 
terior border of pronotum, and scutellum and three spots on the 
mesonotum dark brown or black. Head, excluding the mandibles, 
as broad as long, broader behind than in front, with straight posterior 
and lateral borders. Scale of petiole broad, much compressed antero- 
posteriorly, with thin, sharp, entire or feebly emarginate border. 
Wings colored as in the typical sanguinea. 
Mater. Length 8-8.5 mm. 
Mandibles broad, dentate. Clypeus convex, carinate; emargina- 
tion of its anterior border feeble but distinct. Petiole thick, with 
rather sharp, transverse border. Hairs and pubescence very short 
and sparse, so that the thorax and gaster are more shining than in the 
typical sanguinea; head including the mandibles, opaque. Body and 
antennae black; tips of mandibles brownish; legs brownish yellow. 
Genitalia rather deeply infuscated. Wings colored like those of the 
female. 
Hosts (Temporary). F. fusca and its var. subsericea. 
TYPE LOCALITY.— Ontario: Toronto, (Forel). 
Nova Scotia: Round Hill; Clark’s Harbor, Cape Sable Island 
(A. Halkett). 
New Brunswick: Grand Manan (Centr. Exper. Farms Coll.). 
Maine: South Harpswell (Wheeler). 
New Hampshire: Franconia (Mrs. A. T. Slosson); Summit of Mt. 
Washington (C. S. Bacon and Mrs. A. T. Slosson). 
Massachusetts: Mt. Wachusett (A. C. Burrill). 
