Osgood Thirty New Mice of the Genus Peromyscus. 75 



spot, shorter, less hairy tail, and in the following cranial characters : 

 Parietals larger and wider, with suggestions of a bead at orbital edges; 

 braincase more inflated ; infraorbital plate much narrower ; audital bullse 

 smaller; teeth smaller. It resembles guatemalensis superficially, but is so 

 decidedly smaller as to require no serious comparison with that species. 



Subgenus Haplomylomys Osgood. 

 Peromyscus goldmani sp. nov. 



Type from Alamos, Sonora, Mexico. Adult female, No. 96,340, U. S. 

 National Museum, Biological Survey Collection, December 19, 1898, E. A. 

 Goldman. 



Characters. Similar in general to P. eremicus anthonyi ; size larger (hind 

 foot 24 in type) ; pelage somewhat coarser; color more fulvous and more 

 uniform ; heel slightly hairy ; tail long and cylindrical, covered with 

 short hairs; skull relatively heavy and rather elongate. 



Color. Entire upper parts and sides ochraceous buff finely mixed with 

 black, much darker and richer than in anthonyi and without the grayish 

 cast usually so characteristic of the eremicus group; under parts creamy 

 white with a small ochraceous buff pectoral spot. 



Skull. Larger, longer, and narrower than in eremicus or anthonyi ; brain- 

 case relatively much narrower ; nasals longer and more compressed pos 

 teriorly ; interorbital constriction narrow ; bony palate rather short. 



Measurements. Type: Total length, 217 ; tail vertebrae, 117 ; hind foot, 

 24. Skull of type : Greatest length, 27.3 ; basilar length of Hensel, 21.1 ; 

 zygomatic width, 14.2; interorbital constriction, 4; interparietal, 8.6 x 

 3.2; nasals, 9.6; bony palate, 4.2; palatine slits, 5 x 2.1; diastema, 6.6; 

 postpalatal length, 10 ; upper molar series, 4. 



Remarks. The color of this species is more like that of P. spicilegus 

 than P. e. antlionyi, but its skull and teeth show it to be a member of the 

 eremicus group. 



Peromyscus eremicus phaeurus subsp. nov. 



Type from Hacienda La Parada, San Luis Potosi, Mexico. Adult 

 female, No. 50,438, U. S. National Museum, Biological Survey Collection, 

 August 20, 1892, E. W. Nelson. 



(Geographic distribution. Middle portion of the Mexican tableland in 

 the States of San Luis Potosi, Zacatecas, and Nuevo Leon. 



General characters. Similar to P. eremicus but darker, with tail uniform 

 blackish brown above and below instead of decidedly bicolor as in 

 eremicus or indistinctly bicolor as in some specimens of P. e. anthonyi. 



Color. Similar in general to eremicus, but shades of buff deeper and 

 entire upper parts much more heavily mixed with black ; under parts 

 except tail white; pectoral spot not present; tail blackish brown above 

 and below, this most evident in winter pelage, when the hairiness of the 

 tail is best developed ; feet white, ankles dusky. 



