Merriam. New Pocket Mice from Mexico. 49 



Color. Upperparts dark brown, blackish on saddle, with only very 

 slight grizzling of fulvous; lateral line narrow or indistinct; under- 

 parts and feet white; nose and ankles dusky; tail dusky above, whitish 

 beneath except near tip which is dark all round. %.. 



Cranial characters. Skull very broad, much more massive than in 

 pictus series; nasals slightly emarginate posteriorly, rather broad, their 

 sides parallel on posterior half, then suddenly expanding; zygomata 

 heavy and much more widely and squarely spreading than in any other 

 species; interorbital region and base of rostrum flat; interparietal nearly 

 oval; rostrum rather short, with parallel sides; superciliary beads more 

 strongly developed than usual, and reaching back to middle of parietals. 



Measurements. T) 7 pe specimen: total length 225; tail vertebrse 109; 

 hind foot 29. 



Liomy,s crispus sp. nov. 



Type from Tonala, Chiapas, Mexico. No. 75,105 $ ad., U. S. Na 

 tional Museum, Biological Survey Collection. Collected August 7, 1895 

 by E. W. Nelson and E. A. Goldman. Original No. 8283. 



Characters. Appearance strikingly different from all known members 

 of the genus; size small; tail decidedly shorter than head and body and 

 scantily haired, the scales evident; hind foot with 6 pads; color gray, 

 sprinkled with hoary hairs with recurved tips. 



Color. Upperparts gray, darkest along middle of back and every 

 where sprinkled with slender whitish-tipped hairs which stand out or 

 have the tips recurved, giving the animal a unique appearance; under- 

 parts and feet whitish; no trace of lateral line; ears not edged with 

 whitish; tail pale dusky, palest (sometimes whitish) beneath but with 

 out line of demarcation. 



Cranial characters. Skull mouse-like, with exceedingly faint supra- 

 orbital beads, large roughly oval interparietal, rather broad nasals with 

 parallel sides, squarely truncate behind on same plane with premaxillae. 



Measurements. Type specimen: total length 210; tail vertebrae [ex 

 treme tip gone] 99; hind foot 27.5. 



Liomys crispus setosus subsp. nov. 



Type from Huehuetan, Chiapas, Mexico. No. 77,588 9 old., U. S. 

 National Museum, Biological Survey Collection. Collected February 22, 

 1896 by E. W. Nelson and E. A. Goldman. Original No. 9364. 



Characters. Similar to crispus but pelage much coarser and more 

 hispid; color darker; recurved pale-tipped hairs less abundant; tail 

 averaging longer; skull larger and more massive; supraorbital beads 

 more strongly developed; nasals more cuneate (sides less parallel), less 

 squarely truncate posteriorly, and ending anterior to premaxillae. May 

 prove a distinct species. 



Measurements. Type specimen: total length 225; tail vertebrae 110; 

 hind foot 29. 



