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. 



Male. Length 7-9 mm. 



Indistinguishable from the male of the typical schaufussi. 



Ti^PE 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. schaufussi Mayr, Verb. Zool. hot. ver. Wien, 1886, 36, p. 427, 9 cf . 



F. schaufussi subsp. nitidiventris Emery, Zool. jahrb. Syst., 1893, 7, p. 656, 



taf. 22, figs. 13, 19, y 9 d"; Wheeler, Bull. Amer. mus. nat. hist., 1904, 



20, p. 37. 



