PEROGNATHUS. 95 



subauricular spot bright buff; upperparts black; lateral line ochra- 

 ceous-buff; underparts ochraceous-buff; chin and narrow line on 

 throat and breast white; tail above dusky, beneath whitish, sides 

 buffy; hands and feet buffy; ears brownish black edged with buff. 

 Ex type in United States National Museum. 



Measurements. Total length, 140; tail, 68; hind foot, 17. Skull: 

 Occipito-nasal length, 20.6; Hensel, 13.9; zygomatic width, 10.6; 

 intertemporal width, 4.8; length of nasals, 8.3; length of upper molar 

 series, 2.8; length of mandible, 8.2; length of lower molar series, 2.9. 

 Ex type in United States National Museum. 



1 Perognathus flavescens copei Rhoads. 



Perognathus flavescens copei Rhoads, Proc. Acad. Nat. Sci. Phila., 



1893, p. 404. 

 COPE'S POCKET MOUSE. 



Type locality. Mobeetie, Wheeler County, Texas. 



Genl. Char. Size small; tail hairy, penicillate. 



Color. Head and upper back grizzled blackish fawn; rump, thighs, 

 and lateral line cinnamon; underparts, hands and feet white. 



Measurements. Total length, 114; tail, 49; hind foot, 15. Skull: 

 Total length, 19.5; Hensel, 14.5; mastoid breadth, 10; .nasals, 7; 

 interorbital constriction, 4.5; mandible, 9.7; height of coronoid pro- 

 cess from angle, 4.2. 



This is considered by Bailey (N. Am. Fauna, 1905, No. 25, p. 143) 

 to possess sufficient characters to be recognized as a bright-colored race 

 of P. flavescens. 



Perognathus bombycinus Osgood. 



Perognathus bombycinus Osgood, Proc. Biol. Soc. Wash., XX, 1907, 

 p. 19. 



Type locality. Yuma, Arizona. 



Genl. Char. Similar to P. panamintinus bangsi. Skull with large 

 mastoids and nearly square interparietal. 



Color. Upperparts pale vinaceous-buff, slightly lined with dusky, 

 white spots at base of ear; underparts white. Ex type in United 

 States National Museum. 



Measurements. Total length, 131-140; tail vertebrae, 77-82; hind 

 foot, 18.5. Skull: Occipito-nasal length, 20.4; interorbital constric- 

 tion, 4.4; nasals, 7; interparietal, 2.5 X 2.7; maxillary toothrow, 3. 

 Ex type in United States National Museum. 



1 This in the Check- List is given as a synonym of P. flavescens, p. 301. 



