Merriam. New Pocket Mice from Mexico. 47 



Liomys sonorana gp. nov. 



Type from Alamos, Sonora, Mexico. No. 96,252 $ ad., U. S. National 

 Museum, Biological Survey Collection. Collected December 19, 1898 by 

 E. A. Goldman. Original No. 13,299. 



Characters. Size medium or rather large; pelage strongly hispid; 

 tail hairy; general color harshly grizzled grayish brown; hind foot with 

 6 pads. Size, color, and general external appearance much as in Liomys 

 alleni, but cranially different, and foot pads 6 instead of 5. 



Color. Upperparts grayish drab, coarsely grizzled with fulvous and 

 dark hairs; underparts yellowish white; lateral line fulvous, distinct 

 from under eye to thigh; ears lightly edged with white; feet white, 

 band across end of nose and base of whiskers brownish; tail above 

 dusky, below whitish on basal f, becoming dusky on terminal third. 



Cranial characters. Skull rather large, decidedly heavier than that of 

 pictus; rostrum long and slender with parallel sides; nasals long, deeply 

 emarginate posteriorly; interparietal roughly oval. Compared with 

 Liomys pictus the skull and teeth are larger and heavier; braincase higher; 

 rostrum longer; nasals longer and deeply notched (instead of truncate 

 or faintly emarginate); anterior roots of zygomata heavier and stronger. 



Measurements. Type specimen: total length 262; tail vertebrae 142; 

 hind foot 32.5. 



Liomys veraecrucis sp. nov. 



Type from San Andreas Tuxtla, Vera Cruz, Mexico. No. 65,457 $ 

 ad., U. S. National Museum, Biological Survey Collection. Collected 

 May 7, 1894 by E. W. Nelson and E. A. Goldman. Original No. 6174. 



Characters. Size medium; tail scantily haired; hind foot with 6 pads; 

 color dark. 



Color. Upperparts dark brown, strongly grizzled with black-tipped 

 bristles and intermixed irregularly on head and shoulders with soft ful 

 vous hairs; lateral line most evident on sides of face, faint or absent on 

 sides of body; nose and ankles dusky; ears not appreciably edged with 

 whitish, except near inferior base; tail bicolor, dusky above, whitish 

 beneath. 



Cranial characters. Skull small and smoothly rounded; f rentals an 

 teriorly, and base of rostrum rounded off on side; upper surface of an 

 terior root of zygomata strongly depressed and rounded; nasals notched 

 posteriorly, decurved anteriorly; interparietal sub-triangular. Skull 

 similar in general to that of pictus of which it may prove a subspecies 

 but braincase higher and more arched; f rentals narrower between 

 orbits; rostrum (particularly premaxillae) broader; zygomata more out 

 standing, with anterior root heavier and broader. 



Measurements. Type specimen: total length 220; tail vertebrae 108; 

 hind foot 25. 



