of the Marmots of North. America. 589 



Arctomys Richardsonii. Tawny American Marmot. 



A. auriculis brevibus, rostro acuto, cauda mediocri, corpore 

 fulvescente. 



Tab. XXVIII. 



Nearly the size of the preceding but more slender. Top of the 

 head covered with short hairs, dark at the base and lio'ht at 

 the tips ; face narrow ; nose tapering and sharp, bare at the 

 end, above covered with short light-brown hairs joining 

 and mixing with those on the top of the head ; ears oval 

 and short; cheeks swollen, covered with light-brown hairs; 

 whiskers short, growing from the cheeks, and a few long 

 rigid hairs above the eyes ; throat dirty white ; the fore-teeth 

 of the specimen were broken. Upper part of the body 

 covered with soft short hairs, dark at the base, above ful- 

 vous ; in the middle of the back the hairs are like those on 

 the top of the head but lighter : sides with longer hairs, 

 showing dark at their base when raised, the ends a smoky 

 white, the under-parts similar, but a little dashed with fer- 

 ruginous ; tail three inches and a half long to the end of 

 the hair, slender, and thinly covered with long hairs, which 

 are at the base of the same colour as the body, but above 

 of three distinct colours, first black, next dark, and lastly 

 light at the upper extremity. Legs rather long and slender : 

 feet narrow ; claws horn-coloured, arched and sharp ; on 

 the fore-feet, withinside, a small toe, placed far back, with 

 an obtuse claw ; in having this it differs from the general 

 character of the genus ; outer toe and claw of the fore-feet 

 much shorter than the remaining three, of which the middle 

 one with its claw is longest. Of the hind-toes, the two ex- 

 tremes shorter and placed back, the other three nearly of 

 the same length. 



vol. xiii. 4 o The 



