48 Merriam. New Pocket Mice from Mexico. 



Liomys obscurus sp. nov. 



Type from Carrizal, Vera Cruz, Mexico. No. 108,563 9 ad., U. S. Na 

 tional Museum, Biological Survey Collection. Collected May 12, 1901, by 

 E. W. Nelson and E. A. Goldman. Original No. 14,714. 



Characters. Size (particularly hind foot) rather large for the pictus 

 group (to which it belongs); pelage hispid; color blackish; lateral line 

 conspicuous; tail bicolor; hind foot with 6 pads. 



Color. Upperparts mainly blackish, becoming grayish on sides, and 

 grizzled slightly with fulvous and much more with whitish (due to the 

 showing through of the light basal part of the hairs). 



Cranial characters. Skull clearly of the pictus type but differing from 

 pictus in being slightly heavier and in having the braincase higher, the 

 rostrum and nasals a little longer; nasal endings truncate or emargihate. 

 Compared with its geographic neighbor, vercecrucis, the skull as a whole, 

 but particularly the rostrum, is longer and narrower, the rostrum less 

 decurved, anterior root of zygomata lighter. 



Measurements. Type specimen: total length 230; tail vertebras 124; 

 hind foot 31. 



Liomys phaeura sp. nov. 



Type from Pinotepa, Oaxaca, Mexico. No. 71,500 9 ad., U. S. Na 

 tional Museum, Biological Survey Collection. Collected February 21, 

 1895 by E. W. Nelson and E. A. Goldman. Original No. 7553. 

 ' Characters. Size small; ears rather large; hind foot with 6 pads; tail 

 short and dark all round except under side near base; color grizzled 

 drab brown; skull broad and short. 



Color. Upperparts drab brown grizzled with black and pale fulvous; 

 underparts yellowish white; lateral line fulvous, reaching from in front 

 of eye to thigh; ears faintly edged with whitish; nose and ankles dusky; 

 feet white; tail dusky all round except basal third of under side which 

 is pale, without line of demarcation. 



Cranial characters. Skull broad, short and flat; rostrum and nasals 

 short and slender; braincase and f rentals broad: interparietal subtrian- 

 gular and rather small; zygomata squarely spreading. 



Measurements. Type specimen: total length 204; tail vertebrae 95 [ex 

 treme tip gone] ; hind foot 29. 



Liomys orbitalis sp. nov. 



Type from Catemaco, Vera Cruz, Mexico. No. 65,452 9 ad., U. S. 

 National Museum, Biological Survey Collection. Collected April 29, 

 1894 by E. W. Nelson and E. A. Goldman. Original No. 6129. 



Characters. Size medium; pplage strongly hispid; tail slightly shorter 

 than head and body, sparsely haired; hind foot with 6 pads. Skull 

 broad and heavy, peculiar. 



