VOL. XVII, PP. 129-130 JUNE 9, 1904 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SQUIRRELS OF THE ABERTI GROUP. 

 BY C. HART MERRIAM. 



Mr. John T. Stewart has recently sent me two specimens of 

 a new squirrel collected hy him in the pine forest on the Kaibab 

 Plateau in northern Arizona. One of these, a female, was ob 

 tained in August; the other, a male, in December. They agree 

 in essential characters and differ strikingly from the well known 

 Abert squirrel of the pine forest of the Arizona plateau south of 

 the Grand Canyon. Mr. Stewart, while at work with a field 

 party of the U. S. Geological Survey on the north side of the 

 Grand Canyon, saw seven and obtained four of the new squir 

 rels; he found them scarce and wild. 



In addition to the above-mentioned species the Biological 

 Survey collection contains a number of specimens of a pale form 

 of the Abert squirrel from the south end of the Cimarron Moun 

 tains in northeastern New Mexico, mainly from the neighbor 

 hood of Hall Peak. Both of these are here described. 



Sciurus kaibabensis sp. nov. 



Type from head of Bright Angel Creek, -top of Kaibab Plateau, north side 

 of Grand Canyon of Colorado, Arizona. Adult male, No. 130,982, U. S. 

 National Museum, Biological Survey Collection. December 1, 1903. 

 John T. Stewart. 



Characters, Similar in size and general characters to S. aberti, but under- 



22 PKOC. BIOL. Soc. WASH. VOL. XVII, 1904. (129) 



