68 



NORTH AMERICAN FAUNA. 



[No. 88. 



SCAPANUS LATIMANUS OCCULTUS Grinnell & Swarth. 



♦ Southern California Mole. 



(PI. IV, fig. 5; PI. VI, fig. 14.) 



Scapanus latimanus occuUus Grinnell & Swarth, Univ. California Publ. Zool., vol. 

 10, p. 131, April 13, 1912. 



Type locality. — Santa Ana Canyon, west slope of north end of 

 Santa Ana Mountains, Orange County, California; altitude 400 feet. 



Type specimen. — No. 2369, Mus. Vert. Zool., Univ. California; 9 

 young adult, skin and skull; collected September 20, 1908, by H. S. 

 Swarth. 



GeograpTiic range. — Southern California west of the deserts, from 

 Olancha, at the south end of Owens Lake, in Inyo County; Sanger, 

 in Fresno County; and Santa Barbara, in Santa Barbara County, 

 south to the San Diegan region. 



General cliaracters. — Size small (length of adults usually about 

 145 to 160 mm.); color in winter pelage paler and slightly more 

 brownish than that of 8. I. latimanus; color in summer pelage much 

 like that of latimanus] skull small, weak; rostrum usually relatively 

 longer and narrower than that of latimanus. 



Color. — Winter pelage: In most specimens paler and more brown- 

 ish than corresponding pelage of 8. I. latimanus; upperparts chsetura 

 drab or fuscous, and occasionally, in much faded specimens, olive- 

 brown or mummy brown; underparts somewhat paler and more 

 grayish. 8ummer pelage: Very slightly paler than winter pelage; 

 essentially like summer pelage of latimanus. 



Slcull. — Very similar to that of 8. I. latimanus in general shape 

 and proportions, but much smaller, and in most specimens with rela- 

 tively longer and narrower rostrum. 



Measurements. — Average of 13 young adult males from Compton, 

 Los Angeles County, Cal. : Total length, 151.9 (140-165); tail vertebrae, 

 25.3 (22-29); hind foot (measured, from relaxed foot of dry skin, 

 by the writer), 18.3 (17.5-19.5). Type (young adult female): 150; 

 33; 18. Two young adult females from Olancha, Owens Lake, 

 Cal.: Total length, 148, 155; tail vertebras, 30, 36; hind foot, 18, 19. 

 8Jcull: Average of 13 skulls of young adult males from Compton, Los 

 Angeles County, Cal.: Greatest length, 31.6 (30.7-32.8); palatilar 

 length, 12.3 (12.1-12.8); mastoidal breadth, 15.4 (15-16); inter- 

 orbital breadth, 7.1 (6.9-7.4); maxillary tooth row, 10 (9.7-10.3); 

 mandibular molar-premolar row, 9.5 (9.3-9.9). Average of 4 skulls 

 of adult males from Witch Creek, Cal.: Greatest length, 32.9 (32.6- 

 33.5); palatilar length, 12.9 (12.7-13.2); mastoidal breadth, 15.8 

 (15.5-16.1); interorbital breadth, 7.3 (7.2-7.5); maxillary tooth row, 

 10.3 (10.1-10.5); mandibular molar-premolar row, 9.8 (9.6-10). 

 SkuU of type (young adult female) : Greatest length, 31.5; palatilar 



