ALLEN: AMERICAN COLLARED LEMMINGS. 525 



Peel River, 1 (A. M. N. H.). 



Tuktuyektuk, Mackenzie Delta, 1 (A. M. N. H.). 



Kangiannik, Mackenzie Delta, 1 (A. M. N. H.). 



Liverpool Bay, Nicholson Island, 1 (A. M. N. H.)- 



Anderson River, north of Great Bear Lake, 1 (A. M. N. H.); 1 (U. S. 



N. M.); 1 (M. C. Z.). 

 Ft. Anderson, 2 (U. S. N. M.). 

 Baillie Island, 1 (M. C. Z.); 1 (A. M. N. H.). 

 Horton River, 1 (M. C. Z.). 

 Cape Bathurst, 1 (A. M. N. H.). 

 Franklin Bay, Langton Bay, 2 (A. M. N. H.). 

 Franklin Mts., 1 (A. M. N. H.). 

 Coronation Gulf, 2 (A. M. N. H.). 



DiCROSTONYX RUBRiCATUs RiCHARDSONi Memam. 

 Richardson's Collared Lemming. 



Arvicola groenlandica Richardson, Parry's Second voj'age, App., 1825, 



p. 304 (part). 

 Arvicola hvdsonia J. C. Ross, J. Ross's Narrative second voyage, App., 



1835, p. xiii. 

 Georychus hvdsonius Audubon & Bachman, Quad. N. Anaer. 1854, 3, p. 81, 



(in part), pi. 119. 

 Cuniculus hudsonius Cones, Proc. Acad. nat. sci., Phila., 1874, p. 196 (part). 

 Cuniculuis torquatus Coues, Monogr. N. Amer. Rodentia. Muridae, 1877, 



p. 246 (part). 

 DicTostonyx torquatv^ Miller, N. Amer. fauna, 1896, no. 12, p. 38-40 (in part). 

 Dicrostonyx richardsoni Merriam, Proc. Washington acad. sci., 14 March, 



1900, 2, p. 26. 

 Dicrostonyx hvdsonius richardsoni Elliot, Field Columbian mus. publ. zool. 



ser., 1901, 2, p. 211. 



Type. — Skin and skull, adult male, |f|| C. H. Merriam coll., 

 Fort Churchill, Keewatin, west coast of Hudson Bay, July, 1859. 

 W. MacTavish. 



General characters. — Adult in summer, a nearly uniform ruddy 

 gra}' above, mth a black median stripe from nose to tail. Skull with 

 proportionally longer rostrum, less tapering nasals, and sHghtly more 

 notched, anterior parietal border as compared with typical rubricatus; 

 interparietal with anterior edge forming three points of equal height, 

 with a notch on either side of the median projection. 



