Merriam. New Pocket Mice from Mexico. 45 



Color. Upperparts gray, rather finely grizzled with a mixture of dark 

 hairs, pale fulvous, and the white of the basal part of the hairs which 

 shows through; lateral line absent or indistinct and confined to flanks; 

 underparts and feet white; tail sharply bicolor; above blackish, below 

 white except at tip which is dark all round; ears conspicuously edged 

 and broadly tipped with whitish. 



Cranial characters. Skull large and massive, the frontal region broad 

 and flat; parietal broadly oval; nasals truncate posteriorly. Similar in 

 general to alleni but larger and heavier and very much broader between 

 orbits. 



Measurements. Type: total length 276; tail vertebras 138; hind foot 

 34. 



Liomys torridus sp. nov. 



Type from Cuicatlan, Oaxaca, Mexico. No. 69,645 9 ad., U. S. Na 

 tional Museum, Biological Survey Collection. Collected October 14, 

 1894 by E. W. Nelson and E. A. Goldman. Original No. 6904. 



Characters. S'IZQ small; color gray; ears medium and only indistinctly 

 edged with white; tail longer than head and body, bicolor, well haired; 

 hind feet small (28 mm.). Hind foot with 5 pads. Contrasted with Li 

 omys albolimbatus and alleni it is decidedly smaller, with much smaller 

 hind feet, much less distinct ear edgings, and whitish forelegs [in both 

 the others the forelegs are gray or dusky on outer side] . 



Color. Upperparts gray, grizzled with black on top of head and back, 

 forming a dark saddle on the gray; lateral line usually indistinct; un 

 derparts, forelegs, and fore and hind feet whitish ; tail dark above, whit 

 ish below except at tip which is dark all round. 



Cranial characters. Skull small but rather heavy; zygomata rather 

 broadly and squarely spreading; interparietal narrowly elongate-oval; 

 nasals truncate or slightly emarginate. Easily distinguished from albo 

 limbatus, which inhabits the same region, by its much smaller size, 

 smaller teeth, and truncate nasals. 



Measurements. Type specimen: total length 242; tail vertebrae 134; 

 hind foot 28. 



Liomys torridus minor subsp. nov. 



Type from Huajuapam, Oaxaca, Mexico. No. 70,301 9 &d., U. S. 

 National Museum, Biological Survey Collection. Collected November 

 18, 1894 by E. W. Nelson and E. A. Goldman. Original No. 7061. 



Characters. Similar to torridus but even smaller, with smaller ears, 

 and shorter feet and tail; color more uniform grizzled gray, the back 

 lacking the dark saddle; skull smaller; braincase more arched; inter- 

 parietal more broadly oval; base of rostrum broader; bullae smaller and 

 more smoothly rounded. 



Measurements. Type specimen: total length 222; tail vertebrae 125; 

 hind foot 27. 



