50 



NORTH AMERICAN FAUNA. 



[NO. 39. 



Specimens examined. — Total number, 178, as follows: 



California (Sacramento Valley): Carbondale, 23; Chico, 19; Colusa, 3; Davis, 1; 

 Grafton (Knights Landing), 7; Jackson, 4; Leesville (5 miles west), 2; Marys- 

 ville Buttes, 38; Mokeliimne Hill, 2; Nelson, 1; Oroville (6 miles east), 2; 

 Payne, 1; Red Bluff, 42; Sacramento, 1; St. John, 1; Sites, 8; Tehama, 6; 

 Tracy Lake (San Joaquin Valley), 9; Wheatland, 4; Willows, 1; Winslow, 3, 



THOMOMYS BOTTiE MEWA Merriam. 

 Digger Pine Pocket Gopher. 

 (PL y, fig. 10.) 



Thomomys mewa Merriam, Proc. Biol. Soc. Washington, XXI, 146, June 9, 1908. 



Type. — Collected at Raymond, Madero County, California, by 

 N. HoUister, June 28, 1904. Type specimen in U. S. Nat. Mus., 

 Biological Survey collection. 



Distrihution. — Foothill country on east side of San Joaquin Valley, 

 Cal.,^from Kernville north to Chinese (fig. 6). 



Characters. SmoRer than hottde, blacker in winter pelage, more 

 intensely ochraceous-tawny in summer; skull relatively shorter and 

 wider with more rounded bullae; mammae in 4 pairs. 



Color. — Winter pelage: Whole upperparts dull ochraceous-tawny, 

 heavily clouded with glossy black; underparts bright ochraceous; feet 

 whitish; tip of tail whitish or gray. Summer pelage: Upperparts 

 rich ochraceous-tawny, darkening to blackish on forehead and around 

 nose and ears; underparts lighter and brighter; nose rufous; feet and 

 tip of tail whitish. 



Slcull. — Smaller than in hottd& and relatively shorter and wider, with 

 fuller, shorter, more rounded bullae. Size of navus, but with less 

 protruding mcisors and with zygomatic arches not so conspicuously 

 widened posteriorly; incisors with well-defined inner groove. 



Measurements. — ^Type ( c? ad.): Total length, 225; tail vertebrae, 

 60; hind foot, 27. Topotype (9 ad.) : 196, 53, 25. Slcull (of type) : 

 Basal length, 37.4; nasals, 13; zygomatic breadth, 24.7; mastoid 

 breadth, 20; alveolar length of upper molar series, 7. 



Remarlcs. — ^This little, richly colored gopher occupies the Upper 

 Sonoran foothill country from Kernville north to Chinese but farther 

 north grades into navus, as shown by Wheatland and Jackson speci- 

 mens. Others from Merced approach pascalis in color but have more 

 nearly the cranial characters of mewa. Four females from Kernville 

 are peculiar in abruptly decurved incisors and very rich color. A 

 series of 13 December specimens from Salt Springs are in the fresh 

 black winter pelage with an iridescent purple gloss. 



Specimens examined. — Total number, 117, as follows: 

 California (east side of San Joaquin Valley): Bower Cave (near Mariposa), 3; 

 Camp Badger (Fresno County), 1; Chinese, 2; Coarse Gold, 6; Coulterville, 

 2; Fresno Flat, 5; Kernville, 4; Merced, 6; Merced Falls, 8; Porterville (8 

 miles east), 3; Raymond, 58; Salt Springs, 13; Three Rivers, 3; Wawona, 3., 



