366 PEROGNATHUS. 



Color. Indistinguishable from P. goldmani. The less prominent 

 rump bristles seem chiefly to distinguish this from the preceding one. 



Measurements. Total length, 191; tail vertebrae, 106; hind foot, 

 24.6. Skull: occipito-nasal length, 25.4; Hensel, 18.8; greatest mas- 

 toid breadth, 12.4; length of interparietal, 3.3; greatest width of 

 interparietal, 7.1; interorbital constriction, 6.1; length of nasals, 9.7. 



372. fallax (Perognathus) , Merr., N. Am. Faun., No. i, 1889, p. 19, 



pi. in, fig. 14. Elliot, Syn. N. Am. Mamm., 1901, p. 254. 

 SHORT-EARED CALIFORNIA POCKET MOUSE. 



Type locality. Reche Canon, three miles southeast of Colton, 

 San Bernardino County, California. 



Geogr. Distr. Northern Lower California, Mexico, into southern 

 California. 



Genl. Char. Large; tail crested, longer than head and body; 

 antitragal lobe higher than broad; soles naked. 



Color. Above dark grizzled yellowish brown lined with black; 

 lateral line pale fulvous, covering upper surface of fore leg; beneath 

 white; tail above sooty brown, beneath white. 



Measurements. Total length, 183-211; tail vertebrae, 104-126; 

 hind foot, 24-25; ear, 6. Skull: occipito-nasal length, 26; Hensel, 18; 

 greatest mastoid breadth, 14; length of interparietal, 3.8; greatest 

 width of interparietal, 7.8; interorbital constriction, 6.6; length of 

 nasals, 10. 



a. pallidus (Perognathus}, Mearns, Proc. Biol. Soc. Wash., xiv. 



1901, p. 135. 

 PALLID POCKET MOUSE. 



Type locality. East slope of the Coast Range Mountains, on the 

 Mexican boundary line, San Diego County, California. 



Geogr. Distr. Lower California, Mexico, north to Riverside 

 County, California. 



Genl. Char. Similar to P. fallax, but paler. 



Color. Above pale broccoli brown, slightly mixed with black; 

 under parts creamy white; lateral line pale pinkish buff; tail drab; 

 feet creamy white; ears sparsely covered with white hairs. 



Measurements. "Average of six specimens: total length, 195 

 (188-206); tail vertebrae, 107 (98-112); hind foot, 24.2 (23.7-25); 

 ear from crown, 6.9 (6.5-7)." (Mearns, 1. c.) 



373. anthonyi (Perognathus}, Osgood, N. Am. Faun., No. 18, 1900, p. 56. 

 ANTHONY'S POCKET MOUSE. 



Type locality. South Bay, Cerros or Cedros Island, Lower Cali- 

 fornia, Mexico. 



