NEW HARVEST MICE - 555 



Color. — Upperparts fulvous, moderately lined with black hairs, 

 brightest on sides, where in some specimens (as in the type) it is 

 bright orange fulvous ; underparts pale fulvous (in some specimens 

 buffy) ; a dark spot on ankle ; fore and hind feet usually soiled 

 whitish. 



Cratiial characters. — Skull of medium size; braincase normal; 

 rostrum small; zygomata squarely spreading; bullae rather small; in- 

 cisive foramina medium or rather large ; molars rather small. Com- 

 pared with hirsutus the skull is smaller; rostrum decidedly smaller; 

 zygomata usually more widely and squarely spreading anteriorly ; 

 bullae and teeth decidedly smaller. Compared with the %vi\?^W. griseo- 

 Jlavus from Ameca, Jalisco, the skull averages slightly larger and 

 broader; zygomata decidedly more widely and squarely spreading 

 anteriorly; bulla; smaller; incisive foramina usually longer; molars 

 slightly larger. 



Measurements. — Type specimen ( $ old) : total length 188 mm. ; 

 tail vertebras no; hind foot 21. 



REITHRODONTOMYS LEVIPES OTUS subsp. nov. 



Type from foothill region of Sierra Nevada de Colima, Jalisco, 

 Mexico (altitude 6,500 ft.). No. f|f|f. 9 ad. U. S. National 

 Museum, Biological Survey Coll. April 11, 1892. E. VV. Nel- 

 son and E. A. Goldman. Orig. no. 2439. 

 Characters. — Similar to levipes but pelage softer (less coarse), the 



dark hairs smaller and less noticeable ; ears decidedly larger ; tail 



longer; skull similar, but rostrum slightly longer; bullae averaging 



slightly larger. 



Measurements. — Type specimen ( 9 ad.): total length 202 mm.; 



tail vertebrae 120; hind foot 22. 



REITHRODONTOMYS LEVIPES TOLTECUS subsp. nov. 



Type from Tlalpam, Valley of Mexico. No. 50746. 9 ad. U. S. 



National Museum, Biological Survey Coll. Dec. i, 1892. E. W. 



Nelson and E. A. Goldman. Orlg. no. 3935. 



Characters. — Similar in genei-al to levipes but somewhat larger; 

 color more yellowish (less fulvous) and much more heavily lined with 

 black hairs ; underparts nearly white, instead of fulvous ; fore and 

 hind feet white. Skull narrower; zygomata less widely spreading 

 anteriorly ; nasals longer and ending with premaxillae ; bullae slightly 

 larger. 



Remarks. — Specimens from Patzcuaro, Michoacan, and Zimapan, 

 Hidalgo, while less yellow, appear to be referable to this form. 

 Proc. Wash. Acad. Sci., Nov., 1901. 



