■^62. velox. {Cam's), Say, in Long's Exped. Rocky Mts. , i, 1823, 

 p. 487. 



cinereo-argentatus, Sabine, (nee Erxleb.) Frank Journ., p. 658. 



microtus, Reich. Reg. Anim., p. 10, figs. 72 and 73. 



Type locality. Nebraska. 



Geogr. Distr. Colorado and Nebraska north to the plains of the 

 Saskatchewan, Assiniboia. 



Genl. Char. Size small, head short, broad; legs short; tail half 

 as long as the body and head. 



Color. Top of head, ears, upper part of body and tail yellowish 

 gray, darkest on back, hairs tipped with white; sides of neck, flanks 

 and upper portion of legs buffy white, inclining to rufous where it 

 meets the gray of upper parts. A black patch on each side of 

 muzzle, some hairs white tipped. Under part and legs white; under 

 part of tail buff, tip black. 



Measurements. Total length, 645 ; tail vertebrae, 226 ; hind 

 foot, 95. 



463. macrotis. (Vulpes), Merr., Proc. Biol. Soc. Wash., 1888, iv, 



P- 135- 



Type locality. Riverside County, southern California. 



Geogr. Distr. Southern California south to Mexico. 



Genl. Char. Size small; ears long, broad; muzzle, legs and tail 

 long and slender; tail longer than body. Soles of feet haired. 



Color. Upper parts grizzled gray, palest on head, darkest on 

 back; sides, upper surface of legs and pectoral band pale fulvous. 

 Under parts white mixed with pale ochraceous buff. 



Measurements. Total length, 850; head and body, 510; tail verte- 

 brae, 290; to end of hairs, 340; hind foot, no; height of ear to crown, 

 68. Skull occipito-nasal length, 103; zygomatic breadth, 58.2; inter- 

 orbital constriction, 19.8; palatal length, 55.7; mandible, 83.8; (Mer- 

 riam 1. c.) 



464. lagopus. (Canis), Linn. Syst. Nat., i, 1766, p. 59. 

 Type locality. Lapland? 



Geogr. Distr. Polar regions of both hemispheres from 50° north 

 latitude to Arctic Sea. 



Genl. Char. Size small; tail thick, bushy; pelage changing to 

 white in winter. 



Color. Summer Pelage. Head and upper parts, flanks and out- 

 side of legs, brown; under parts and inside of legs dingy white; tail 

 brownish above, white beneath, tip white. 



Winter Pelage. Pure white. 



Measurements. Total length, 787; tail vertebrae, 262; heel to end 

 of claw, 115. 



