122 Merriam New Mice from Mexico and Guatemala. 



hind foot 29.5. Average of 10 specimens from type locality : Total length 

 258 ; tail vertebrae 138 ; hind foot 29. 



Peromyscus tehuantepecus sp. nov. 



Type from Tehuantepec, Oaxaca, Mexico. No. 75302, $ ad., U. S. Nat. 

 Mns., Biological Survey Coll. Collected May 23, 1895, by E. W. Nelson 

 and E. A. Goldman. Orig. No. 7980. 



Characters. Size medium ; ears medium and nearly naked ; tail me 

 dium, scantily haired ; color brownish or buffy-fulvous. Similar to P. 

 mexicanus, but very much paler and with distinctive cranial characters. 



Color. Upper parts pale brownish-fulvous, slightly darkened on back 

 by admixture of black hairs, becoming pure buffy-fulvous on cheeks and 

 sides ; under parts and lips whitish, often tinged with yellowish or buffy 

 and with a buffy-salmon suffusion on pectoral region; ankles dusky in 

 front, the dusky reaching out a short distance on metatarsus ; fore and 

 hind feet whitish ; tail dusky, its under side irregularly marked with 

 yellowish. 



Cranial characters. Skull similar to that of mexicanus, but braincase and 

 zygomata narrower ; rostrum larger ; interparietal decidedly larger. 



Measurements. Type specimen: Total length 243; tail vertebrae 124; 

 hind foot 26. Average of 4 specimens from type localitj 7 : Total length 

 248.5; tail vertebrae 127; hind foot 27. 



Peromyscus oaxacensis sp. nov. 



Type from Cerro San Felipe, Oaxaca, Mexico (alt, 10,000 ft. ). No. 68426, 

 $ yg. ad. U. S. Nat. Mus., Biological Survey Coll. Collected Sept. 1, 

 1894, by E. W. Nelson and E. A. Goldman. Orig. No. 6700. 



Characters. Size medium, about equalling P. mexicanus ; ears medium 

 and nearly naked ; tail long and scant haired but decidedly more hairy 

 than in mexicanus and its subspecies, from which it differs further in 

 being sharply bicolor. 



Color. Upperparts from nose to tail dull fulvous, darkened on back by 

 admixture of black hairs ; a very narrow dusky ring round eye ; under- 

 parts, lips, and fore feet white; ankles dusky ; hind feet white except at 

 extreme base, where dusky of ankles reaches down a short distance ; tail 

 dusky above, white below. Specimens from Mts. 15 miles west of Oaxaca 

 show two pelages, one considerably darker ihan that here described. 



Cranial and dental characters. Skull similar to that of mexicanus, but 

 postpalatal notch much broader ; audital bullte larger ; m 1 narrower and 

 less bellied on inner side behind anterior cusp ; m T with a supplementary 

 narrow enamel loop on outer side in front of posterior cusp. 



Measurements. Type specimen : Total length 242 ; tail vertebrae 1 22 ; 

 hind foot 27. 



Peromyscus felipensis sp. nov. 



Type from Cerro San Felipe, Oaxaca, Mexico (alt. 10,200 ft.). No. 68409, 

 tf ad. U. S. Nat. Mus., Biological Survey Coll. Collected Aug. 22, 1894, 

 by E. W. Nelson and E. A. Goldman. Orig. No. 6611. 



