— P.N.E.Z.C: 
54 BANGS THREE NEW WEASELS Vol. 1 
Brimley: total length (including pencil), 426.; tail (including pencil), 169.; 
pencil, 30.mm. No. 32,239, coll. Biological Survey, Washington, of adult, from 
Washington, D. C., coll. by Donaldson, total length, 371.; tail vertebra, 123.; 
hind foot, 46.5 mm.? 
Remarks.—In my ‘ Review of the Weasels of Eastern North 
America,’ I mentioned the fact that P. zoveboracensts at the southern 
extreme of its range has yellow under parts. I had named the 
form in my manuscript, but at the last moment I united it again 
with true P. noveboracensis. Since then I have examined a very 
large number of additional specimens, and I no longer hesitate to 
set up P. noveboracensis notius as a subspecies. The color of the 
under parts of weasels is a good character. /. ”. nofius has, 
always, yellow under parts, while the northern form, true /. 
noveboracensis, has pure white breast and belly. 
Putorius occisor® sp. nov. 
Type, from Bucksport, Maine, & , old adult (in white winter pelage), no. 9102, 
coll.of E. A. and O. Bangs; taken Jan. 15, 1899, by Alvah G. Dorr; measured, 
sexed and skinned by O. Bangs. 
Description.— Size of male very large, female much smaller; tail very long, 
close-haired— much less bushy than in P. xoveboracensis; black end of tail 
very short, usually occupying little more than the pencil;* hind foot large; 
summer pelage unknown; winter pelage pure white all over, except terminal 
black pencil of tail, and, in a few specimens, a yellow wash on tail, belly and 
lower back. 
Skull of male large and heavy, proportionately shorter, and broader across 
mastoids, than that of P. xoveboracensis, with wider, flatter frontals; rostrum 
shorter and heavier; zygomatic arch shorter, heavier and more bowed outward, 
and ending posteriorly much more squarely; audital bullz longer and flatter. 
Dentition heavier throughout — especially upper carnassialand molar. Female 
skull larger than that of P. xoveboracensis; frontals wider; rostrum rather 
shorter and heavier; zygomatic arch shorter, ending more squarely behind; 
1The type was not measured in the flesh. The two specimens I give measurements of were 
lent to me at the time I was working on the weasels of eastern North America. They are both 
extreme of the southern race. 
2 Occisor —a slayer, murderer. 
3 The black portion of the tail in the type, 3b , old adult, measures 54 mm. ; in no. gr1s, a 
adult, topotype, it measures 65 mm. These are the extremes in a series of six males. In no. 
gior, 9 adult, topotype, it measures 28 mm. 
