46 Merriam. New Pocket Mice from Mexico. 



Liomys plantinarensis sp. nov. 



Type from Plantinar, Jalisco, Mexico. ffff 9 ad., U. S. National 

 Museum, Biological Survey Collection. Collected April 4, 1892 by E. 

 A. Goldman. Original No. 2383. 



Characters. Size small smallest of the pictus group; ears small; 

 color reddish; tail lightly haired; hind foot with 5 pads. 



Color. Upperparts grizzled fulvous and blackish, the fulvous pre 

 dominating except on the saddle, where they are about equally mixed; 

 lateral line fulvous, broad and continuous from throat to thigh ; under- 

 parts yellowish white; feet white; tail bicolor, drab above, whitish 

 below; ears edged with whitish. 



Cranial characters. Skull smallest of the group [and in fact, of the 

 known species of the genus] arched and rounded; nasals deeply notched 

 posteriorly, ending essentially on same plane with premaxillse; supraor- 

 bital bead faint; interparietal narrowly oval. Differs from pictus in 

 much smaller size, notched instead of truncate nasals, narrow instead 

 of broad interparietal, and smaller and more decurved rostrum and 

 nasals. 



Measurements. Type specimen: total length 202; tail vertebrae 102; 

 hind foot 26. 



Liomys pictus rostratus subsp. nov. 



Type from near Ometepec, Guerrero, Mexico. No. 71,488 $ ad., U. 

 S. National Museum, Biological Survey Collection. Collected February 

 14, 1895 by E. W. Nelson and E. A. Goldman. Original No. 7447. 



Characters. Similar to pictus but slightly larger; pelage coarser; color 

 less red. Skull larger and heavier; rostrum and nasals decidedly longer; 

 interparietal more oval; interorbital region broader; nasal endings either 

 truncate or slightly notched. 



Measurements. Type specimen: total length 252; tail vertebrae 133; 

 hind foot 29. 



Liomys pictus isthmius subsp. nov. 



Type from Tehuantepec, Mexico. No. 73,367 $ , U. S. National 

 Museum, Biological Survey Collection. Collected April 28, 1895 by E. 

 W. Nelson and E. A. Goldman. Original No. 7796. 



Characters. Similar to pictus, from which it differs in color, the up- 

 perparts being very much paler, much less red, the lateral line absent or 

 faint; the dark nose patch obsolete. The differences are marked when 

 the animals are turned on their sides, the bright fulvous cheeks of pictus 

 contrasting strongly with the pale grayish brown cheeks of isthmius. 

 The skull is slightly smaller, with narrower rostrum and more evident 

 supraorbital bead. 



Measurements. Type: total length 245; tail vertebrae 130; hind foot 

 30. 



