WHEELER: ANTS OF THE GENUS FORMICA. 555 
to be no very constant difference in coloration, although in general 
the gaster is often fuscous or even blackish and the head and thorax 
may have a deeper, more brownish or reddish tint. 
FEMALE. Length 8-9 mm. 
Color, as a rule, darker than in the female schaufussi. In addition 
to the three dark spots on the mesonotum, the gaster and the posterior 
portion of the head may be dark brown, the former sometimes blackish. 
Hairs and pubescence sparser and shorter than in the type, gaster 
smoother and more shining. 
Mate. Length 7-9 mm. 
Indistinguishable from the male of the typical schaufusst. 
Typr LocaLity.— District of Columbia (Th. Pergande). 
Virginia: (Th. Pergande). 
New Jersey: Lakehurst, Weasel Mt. (Wheeler); Alpine, Ft. Lee 
(Wm. Beutenmiiller). 
New York: New York (C. T. Brues); West Farms (J. Angus); 
Bronxville, Tuckahoe (Wheeler); Niagara Falls, Arlington, Staten 
Island (Wheeler). 
Pennsylvania: Ashbourne; Lehigh Gap. 
Connecticut: Colebrook, Winsted, Norfolk (Wheeler); Bradford 
(Winkley); Rockville (H. L. Viereck). 
Massachusetts: Wellesley, Sherborn (A. P. Morse); Boston 
(Wheeler); East Northfield (A. C. Burrill). 
New Hampshire: Durham (C. M. Weed). 
Illinois: Rockford (Wheeler). 
Wisconsin: Racine, Milwaukee (C. E. Brown). 
Colorado: Colorado Springs, Cheyenne Canyon (Wheeler). 
New Mexico: Las Valles (Miss Mary Cooper). 
This variety, which lives in the same situations and has the same 
habits as the typical schaufussi, though ranging considerably further 
west, is, as Emery observed, very unstable or variable both in color 
and pilosity. Some pale specimens are almost indistinguishable from 
schaufussi while others are smaller, more deeply colored and have so 
few hairs and such short pubescence that they are equally close to 
nitidiventris. Moreover, such different forms are often present in the 
same colony. 
137. F. (N.) PALLIDEFULVA NITIDIVENTRIS. Emery. 
F. schaufussit Mayr, Verh. Zool. bot. ver. Wien, 1886, 36, p. 427, 9 o. 
F. schaufussi subsp. nitidiventris Emery, Zool. jahrb. Syst., 1893, 7, p. 656, 
taf. 22, figs. 13,19, 8 92 oc; Wheeler, Bull. Amer. mus. nat. hist., 1904, 
20, p. 37. 
