Osgood Thirty New Mice of the Genus Peromyscus. 69 



considerable departure from typical banderanus. The small series from 

 La Salada have uniformly narrow skulls, noticeably narrower than in 

 banderanus, but specimens from Los Reyes and La Huacana indicate that 

 this is not a stable character. It seems, however, to be worth mentioning. 

 Specimens examined. Total number, 15, from localities in Mexico as fol 

 lows: Guerrero, Acahuizotla, 3 ; Michoacan, La Huacana, 4, La Salada, 6, 

 Los Reyes, 2. 



Peromyscus banderanus angelensis sp. nov. 



Type from Puerto Angel, Oaxaca, Mexico. Adult female, No. 71,442, 

 U. S. National Museum, Biological Survey Collection, March 13, 1895, 

 K. W. Nelson and E. A. Goldman. 



Characters. Similar to typical P. banderanus, but slightly larger; skull 

 with supraorbital bead nearly obsolete instead of being well developed. 



Color. Almost exactly as in P. banderanus; possibly averaging a trifle 

 darker. 



Skull. Larger than in banderanus; braincase less elongate and inter 

 parietal shorter; nasals longer; supraorbital edges reduced to simple 

 shelves, much as in P. melanophrys, without an elevated bead bounded 

 by a sulcus on the inner side ; molar teeth slightly larger than in bander- 

 auus ; audital bullre about as in banderanus and aztecus, much smaller than 

 in mrlannphrys. 



l^feasurements.Type: Total length, 235; tail vertebrae, 123 ; hind foot, 

 26.5. Average of 7 adult topotypes, 235 (222-258); 120 (112-128); 27 

 (26.5-28). Skull. Two adults: Greatest length, 31.3*-33.4; basilar 

 length of Hensel, 23.4-24.9; zygomatic width, 15-15.4; interorbital 

 width, 5.2-5; nasals, 11.7-12.8; interparietal, 3.6 x 10.6-3.4 x 11.2; 

 upper molar series, 4.6-4.6; palatine slits, 6 x 2.4-5.7 x 2.4. 



Remarks. The naked soles of this form decide its affinities with ban 

 deranus, and its color is also in accord, but its skull with the supraorbital 

 beads nearly obliterated suggests that of P. aztecus. Close examination 

 of detailed characters of the skull, however, leaves scarcely any room for 

 doubt that its proper position is with banderanus. 



Specimens examined. Total number, 22; 20 from the type locality and 

 2 from Pluma, Oaxaca. 



Peromyscus mexicanus teapensis subsp. nov. 



Type from Teapa, Tabasco, Mexico. Adult female, No. 100,022, U. S. 

 National Museum, Biological Survey Collection, March 25, 1900, E. W. 

 Nelson and E. A. Goldman. 



Characters. Similar to P. m. totontepecus, but sides brighter and more 

 contrasted with dark area in middle of back ; skull with thicker, heavier 

 rostral region. 



* Measurements mentioned first are those of the type. 



