1915. ] 



THOMOMYS ALPINUS GROUP. 



65 



Color. — Summer pelage: Upperparts dull dark ochraceous; under- 

 parts Yarying from pale buffy to ochraceous ; belly irregularly marked 

 and spotted with white in all Yosemite specimens; feet and distal 

 half of tail whitish. Winter pelage: Darker, more dusky ochraceous. 



Shull. — But httle arched; not ridged or angular; rostrum short 

 and incisors abruptly decurved; interorbital region wide and flat; 

 interparietal usually short and wide ; bullse small and well rounded. 



Measurements. — Topotype ( c? ad.): Total length, 220; tail verte- 

 brse, 75; hmd foot, 27. Type ( 9 ad.) : 194, 54, 26. SluU (of type) : 

 Basal length, 32; nasals, 12; zygomatic breadth, 21 ; mastoid breadth, 

 17; alveolar length of upper molar series, 7. Skull of male from 

 Merced Kiver: 34, 12.4, 22, 18.5, 7.5. 



Remarlcs. — This form is not represented by a good series of adult 

 male specimens from any one locality, but specimens from scattered 

 localities throughout the Transition Zone, from Crockers (north of 

 the Yosemite Valley) south to the vicinity of Mineral King, show the 

 same general characters. Those from near Mineral King are some- 

 what darker than specimens from the Yosemite Valley and suggest 

 an approach to alpinus, while those in the Yosemite are paler and 

 have irregular white markings. Others from Kern River Lakes 

 and Piute Mountain and one from Tehachapi Peak are also referred 

 to it, but they show considerable variation. 



Specimens examined. — Total number, 116, as follows: 

 California (southern and western slopes of the Sierra Nevada): Alta Mead- 

 ows (Giant National Forest), 2; Connell Meadow (Tulare County, 7,500 

 feet altitude), 11; Halstead Meadows (in Sequoia National Park, 7,000 feet), 5; 

 Horse Corral Meadows (in Sequoia National Park, 8,000 feet), 2; Huckleben-y 

 (near Giant National Forest), 1 ; Kaweah River (east fork, 5,600 and 8,900 feet), 

 2; Kern River Lakes, 2; Mineral King, 8; Piute Mountain (5,000 feet?), 31; 

 Sequoia (Crocked), 6; South Fork Merced River (4,000 feet), 1; Taylor 

 Meadow (Tulare County, 7,000 feet), 25; Tehachapi Peak, 1; Wawona, 2; 

 Yosemite Valley, 17. 



THOMOMYS NEGLECTUS Bailey. 

 San Gabriel Pocket Gopher. 



(PL V, fig. 15.) 



Thomomys neglcctus Bailey, Proc. Biol. Soc. Washington, XXVII, 117, July 10, 1914. 



Type. — Collected on San Antonio Peak (Bear Flat Meadows at 

 6,400 feet altitude) in the San Gabriel Mountains, California, by 

 James H. Gaut, July 23, 1905. Type specimen in U. S. Nat. Mus., 

 Biological Survey collection. 



Distrihution. — Known only from type locality (fig. 6). 



Characters. — Size medium; colors grizzled with a dark mixture of 

 ochraceous and black; skull long and narrow, with almost straight 

 dorsal outline; mammae in 4 pairs, inguinal 2-2, pectoral 2-2. 

 98121°— 15 5 



