1915.] 



MAKMOTA MOITAX GEOTJP. 



29 



Massacliiisetts: Essex County, 1; Haverhill, 1;^ Lunenburg, 4; Newton ville, 

 2; ^ Sherbom, 1; Springfield, 2; ^ Vv^areham, 2; ^ Wayland, 1; ^ Wilmington, 8; 

 Wobum, 1. 



New Hampshire: Charlesto"\Yn, 2; Ossipee, 2; Webster, 3.^ 

 Rhode Island: Saunderstomi, 1. 

 Vermont: Rutland, 3.^ 



MARMOTA MONAX IGNAVA (Bangs). 



Labrador Woodchuck. 



(PI. V, fig. 4; PI. XII, fig. 1.) 



Arctomys ignavus Bangs, Proc. New England Zool. Club, I, 1899, p. 13. 



[Arctomys monar] ignavus Elliot, Synop. Mamm. N. Am., Field Columb. Mus., Zool. 



Ser., II, 1901, p. 105. 

 [Marmota monax] ignavus Trouessart, Cat. Mamm., Suppl., 1904, p. 344. 

 Marmota ignava Miller, Bui. 79, IT. S. Nat. Mus., 1912, p. 292. 



Type locality. — Black Bay, Straits of Belle Isle, Labrador. 



Distrihution. — Known only from yicinity of type locality; probably 

 north to Hamilton Inlet. 



diameters. — Size much larger than canad^ensis , nearly equaling 

 rvfescens; similar in color to rufescens (much darker than canadensis); 

 skull short and broad with very broad nasals. 



Color. — ^Underfur of upperparts blackish brown at base (a shade 

 darker than in canadensis), succeeded by a broad area of orange- 

 cinnamon; long hairs blackish brovm sub terminally, tipped with 

 pale ochi'aceous-buff or buffy white; top of head and face Vandyke 

 brown or clove brown; sides of nose and borders of hps and chin 

 buffy white; sides of face hght ochiaceous-buff more or less mixed 

 with broYvTi; feet and legs black, or very dark brown, the legs and 

 thighs overlaid with burnt sienna ; tail blackish brown, usually v^th 

 little or no white grizzhng; underparts burnt sienna mixed with 

 black, varying to ta^vny and in some individuals more or less mixed 

 with pinkish cinnamon or pale buff; in others, mixed blackish brown 

 and buff below without any red. 



SJcull. — Similar to that of rufescens, but shorter and relatively 

 broader; nasals shorter and relatively wider posteriorly; premaxil- 

 lae averaging narrower; bullae smaller and less inflated; sagittal 

 crest more prominent; incisors with numerous shallow longitudinal 

 grooves on outer face. Compared with prehlorum: Skull about same 

 length, but relatively broader; rostrum broader; nasals shorter and 

 broader posteriorly; molars heavier. Compared with canadensis: 

 Skull much larger, with decidedly heavier sagittal crest and less 

 inflated bullae. 



Measurements. — Adult male:^ Total length, 480-562 (average, 

 536); tail vertebrae, 111-155 (137); liind foot, 74-86 (80.8). Adult 



1 Collection Mus. Comp. Zool. 



2 Collection Amer. Mus. Nat. Hist. 



3 Seven specimens from vicinity of type locality. 



