414 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Hosts (Staves). F. fusca vars. argentea, subaenescens, and neo- 
clara; F. cinerea var. neocinerea; F. pallidefulva nitidiventris; F. 
neogagates lasioides var. vidua. 
TYPE LOcALITY.— South Dakota: Hill City, (Emery). 
Colorado: Manitou, Colorado Springs, Cheyenne Canyon, Ute 
Pass, Woodland Park (Wheeler); Breckenridge, West Cliff (P. J. 
Schmitt). 
Utah: Stockton (T. Spalding). 
Washington: Pullman (W. M. Mann); Olympia (T. Kincaid). 
Montana: Helena (W. M. Mann). 
New Mexico: Manzanares (Miss Mary Cooper); Alamogordo 
(G. v. Krockow); Gallinas Canyon (T. D. A. Cockerell).. 
Texas: Ft. Davis (Wheeler). 
Missouri: Doniphan (P. J. Schmitt). 
Illinois: Rockford (Wheeler). 
This subspecies replaces subintegra at lower altitudes and in warmer 
situations in the Western States. Occasionally one finds specimens 
of the latter form which approach puberula in the somewhat longer 
pubescence on the legs and the more abundant hairs on the body. 
I have taken such specimens at Lakehurst, N. J. The males of 
puberula from Illinois are abnormally small (7 mm.), and in the shape 
of the clypeus resemble subintegra. Apart from the conspicuous dif- 
ferences in pilosity, the workers of the two forms can be separated in 
nearly all instances by the pubescence, which, on the anterior surfaces 
of the tibiae, is very fine, dense, and appressed in subintegra, but 
distinctly longer, sparser, coarser, and more oblique in puberula, so 
that in this form it takes on the appearance of minute hairs. I have 
seen no specimens of puberula which show this condition also on the 
antennal scapes; on these organs the fine, dense pubescence is merely 
a little longer but scarcely more oblique than in subintegra. 
13. F. SANGUINEA OBTUSOPILOSA Emery. 
F.. sanguinea subsp. obtusopilosa Emery, Zool. jahrb. Syst., 1893, 7, p. 648, 8 ; 
Wheeler, Ants, 1910, p. 458, 570. 
Worker. Mandibles finely striated, feebly punctate. Clypeus 
rather deeply and broadly notched. Petiole narrow and thick, with 
blunt superior border, resembling the petiole of F. pallidefulva. 
Gaster opaque, with feeble metallic luster, its pubescence not dense 
but long and whitish. Erect hairs more abundant than in the other 
subspecies, whitish yellow, all nearly of the same length, enlarged 
