1G0 
ARCTOMYS FL AVI VENT ER.— Bach. 
Yellow-bellied Marmot. 
PLATE CXXXIV.— Male. 
A. Supra flavido-albo nigroque griseus, capitis vertice nigro, subtus 
saturate flavus, nasi extremitate labiis, mentoque albis, pedibus fuscescento 
flavis, cauda subnigra. 
CHAEACTEES. 
Upper parts, grizzled yellowish-white and black ; crown of the head, chiefly 
black ; under parts, deep yellow ; point of nose, lips, and chin, white ; feet, 
brownish-yellow ; tail, blackish-brown. 
SYNONYMES. 
Arctomys Flaviventer. Bachman, Proc. Acad. Nat. Sci. Phila., October 5, 1841. 
Catal. Zool. Soc. 1889, Specimen No. 459, Bachman’s MSS 
DESCEIPTION. 
In form this animal resembles the figures and descriptions of what was 
formerly considered the Canada Marmot {Arctomys empetra ), which has 
since been ascertained to be the young of the Maryland Marmot {A. monax ). 
Head, rather small ; ears, small and narrow ; nails, short ; tail, rounded, 
and rather long ; the whole animal is thickly clothed with fur, somewhat 
softer than that of the Maryland Marmot. 
1 he upper incisors have several indistinct longitudinal grooves. 
COLOUB. 
Fui on the back, grayish-black at base ; on each hair a considerable 
space is occupied by dirty yellowish-white, which is gradually shaded 
towards the tips through brown into black, but the tips are yellowish- 
white. 
Hairs on the under surface, grayish-black at base; hairs of the feet, 
chiefly black at base ; cheeks, grizzled with white and dark brown, the 
latter colour prevailing ; a rusty brown patch on the throat borders the 
