44 Merriam. New Pocket Mice from Mexico. 



and indistinct streak on inner side of hind leg, white; hind feet whitish, 

 clouded above; tail dusky above, whitish beneath (except tip, which is 

 dark all round) ; ears without whitish edges. 



Cranial characters. Skull long and slender, rather light, rounded on 

 the sides, narrow across anterior roots of zygomata, with exceedingly 

 faint supraorbital beads, small oval interparietal, no tubercle over root 

 of lower incisor, and large teeth; rostrum long and slender; nasals trun 

 cate or slightly emarginate, ending on same plane with premaxillae. 



Measurements. Type specimen: total length 356; tail vertebrae 195; 

 hind foot 43.5. 



Genus Liomys nob. 



Type, Heteromys alleni Coues. 



Characters. Size medium or small; pelage hispid; tail rarely longer 

 than head and body, well haired; skull murine in general appearance; 

 angle of jaw strongly everted; molar crowns, above and below, consist 

 ing of two parallel transverse loops which with advancing age unite on 

 one side (inner side on upper row, outerside on lower row) to form a horse 

 shoe as in Heteromys, but without additional lobes or permanent enamel 

 islands. 



Liomys texensis sp. nov. 



Type from Brownsville, Texas. No. 58,670 9 ad., U. S. National 

 Museum, Biological Survey Collection. Collected February 19, 1894 by 

 J. Alden Loring. Original No. 1672. 



Characters. Size medium or rather small; general color coarsely 

 grizzled reddish brown. Hind foot with 5 pads. Similar in general to 

 Liomys alleni. but smaller, paler, redder, and much more coarsely griz 

 zled. 



Color. Upperparts pale grayish brown or drab, coarsely grizzled with 

 red and blackish hairs (the red predominating); underparts yellowish 

 white; ears edged with whitish; hind feet and underside of tail white. 



Cranial characters. Skull similar in general to that of alleni but 

 smaller and lighter, with much narrower rostrum (especially posteriorly) 

 and smaller (short oval) interparietal. 



Measurements. Type specimen: total length 231; tail vertebrae 114; 

 hind foot 30 [probably 32]. 



Liomys canus sp. nov. 



Type from Parral, Chihuahua, Mexico. No. 96,259 $ ad., U. S. Na 

 tional Museum, Biological Survey Collection. Collected Sept. 21, 1898 

 by E. W. Nelson and E. A. Goldman. Original No. 13,036. 



Characters. Size largest of the group; tail hairy; hind foot with 5 

 pads. Closely related to atteni but larger and grayer. 



