82 Goldman — Descriptions of Five New Mammals from Mexico. 



to that of N. tenaicaada, but nasals longer and narrower and premaxillse 

 longer. 



Color. —Upper parts dark brown, beconiino; brownish fulvous on cheeks, 

 shoulders, and along sides, this color encroaching on under parts poste- 

 riorly, leaving a narrow, whitish area alongthe median line of the belly ; 

 rest of under parts, except a salmon colored band across pectoral region 

 in the type, dull whitish (the plumbeous basal color showing through) ; 

 ears faintly edged with whitish ; tail nearly unicolor, dusky above, 

 slightly paler below; fore and hind feet clouded with dusky, the toes of 

 hind feet whitish. 



Skull. — Somewhat like that of i\". te)uiicanda, but nasals more wedge- 

 shaped, much longer and narrower, reaching plane of lachrymals ; ascend- 

 ing branches of premaxillte very long, reaching; beyond plane of lach- 

 rymals; frontal region broader and flatter posteriorly; teeth smaller. 

 Compared with that of N. jKirvidens, the skull is larger and flatter, 

 braincase larger and more smoothly rounded ; nasals and ascending 

 branches of premaxillfe longer ; teeth larger. 



Measarevients. — Type: Total lengtli, 325; tail vertebrpe, 156; hind foot, 

 34. Skull of type : Greatest length, 41.3 ; basilar length of Hensel, 33 5 ; 

 zygomatic breadth, 22.2; length of nasalo, 16.5; interorbital breadth, 

 5.8; palatal length, 7.9; diastema, 11.2; upper molar series on alveolus, 

 8.3. 



Specimens examined. — Two, from the type locality. 



Liomys parviceps sp. nov. 



Type from La Salada, 40 miles south of Uruapan, Michoacan, Mexico. 

 Adult female, No. 126,477, U. 8. National Museum, Biological Surve}' 

 Collection, March 19, 1903, E. W. Nelson and E. A. Goldman. Original 

 number 16,194. 



Characters. — Size very small; color reddish; tail of moderate length. 

 ^innlar io L. plantinarensis but less fulvous ; skull smaller; tail slightly 

 longer; hind foot shorter, 6- instead of 5-tuberculate. 



Color. — Upper parts grizzled brownish fulvous ; under parts, fore and 

 hind feet, white; fulvous lateral line rather faint; ears edged with 

 whitish ; tail distinctly bicolor, brownish above, whitish below. 



Shdl. — Smallest of the known species of the genus. Similar to that of 

 L. plant inareiisis, but smaller and flatter ; brainca.se less expanded ; inter- 

 parietal smaller; rostrum less decurved ; nasals more arched anteriorly, 

 notched posteriorly as in L. planlinarensis. 



Measarement!<. — Type: Total length, 202 ; tail vertebrae, 110 ; hind foot, 

 24. Average of five adult males and females from the type locality: 

 Total length, 204 (197-214); tail vertebra, 105 (102-110); hind foot, 24 

 (24). Skull of type : Greatest length, 28.3 ; basilar length of Hensel, 20 ; 

 zygomatic breadth, 13; length of nasals, 11.5 ; interorbital breadth, 6.7; 

 interparietal, 3.2 x 8.3; upper molar series on alveolus, 4.2. 



Specimens p. vammed. — Total number, 16, from the following localities: 

 La Salada, Michoacan (type locality), 11; Rio Balsas, Guerrero, 5. 



