240 Psyche [December 
Female. Length 6-7 mm. 
Dark brown; mandibles, appendages, pleure, epinotum and petiole usually 
reddish or yellowish. Basal half of wings strongly infuscated. Pilosity and pubes- 
cence similar to those of the worker but the pubescence on the gaster denser so 
that this region is much less shining than in the worker. Erect hairs on the gaster 
often absent, when developed scattered and very short except on the terminal 
segments. Eyes very hairy. Petiole from behind with rounded sides and upper 
border, the latter feebly emarginate. 
Male. Length 44.5 mm. 
Mandibles with two apical and no basal teeth. Body black; appendages pic- 
eous; wings colored like those of the female. Surface, especially that of the gaster, 
smooth and shining. Pilosity moderately developed, erect; absent on the scapes 
and legs; pubescence more dilute and inconspicuous than in the worker. Eyes 
hairy. 
I have followed Emery in regarding this subspecies as the one 
which Walsh described as Formica aphidicola, though his descrip- 
tion is very inadequate. As it is our most common form of wmbra- 
tus, it is, in all probability, the one which he saw. The types came 
from Rock Island, Ill. I have examined numerous specimens from 
the following localities: 
Illinois: Rockford (Wheeler); Algonquin (W. A. Nason). 
Wisconsin: Milwaukee (C. E. Brown). 
Michigan: Ann Arbor (J. Dawson). 
Maine: Elms (W. Deane). 
New Hampshire: Mt. Washington (Mrs. A. T. Slosson). 
Massachusetts: Boston (Wheeler); Essex County (G. B. King); 
Medford (Mus. Comp. Zool.). 
Connecticut: Colebrook (Wheeler); Westport (W. E. Brit- 
ton). 
New York: Bronxville (Wheeler); Bergen Beach (G. v. Kroc- 
kow); Staten Island (W. T. Davis). 
New Jersey: Ithaca (J. C. Bradley); Fort Lee, Great Notch 
and Ramapo Mts. (Wheeler); Tom’s River (W. T. Davis); Wood- 
bury (H. Viereck). 
Pennsylvania: St. Vincent (P. J. Schmitt), Philadelphia; Tin- 
icum Islands; Enola. 
North Carolina: Black Mts. (Wm. Beutenmuller); Raleigh 
(F'. Sherman). 
Colorado: Florissant and Colorado Springs (Wheeler); Eldora, 
8,600 ft. (Mrs. W. P. Cockerell). 
