42 Merriam. New Pocket Mice from Mexico. 



including upper lip, inner sides of fore and hind legs, fore and hind feet, 

 white; tail dusky, in males only faintly paler below and with tip whit 

 ish; in females whitish below on basal f and without white tip. Ears 

 without white edges. 



Cranial characters. Skull large and massive; with well developed 

 supraorbital beads and rather large irregularly oval interparietal; f ren 

 tals broadened by supraorbital shelves; nasals truncate posteriorly on 

 plane of premaxillae. 



Measurements. Type specimen: total length 347; tail vertebrae 199; 

 hind foot 40. 



Heteromys gold man i lepturus subsp. nov. 



Type from Mountains near Santo Domingo, Oaxaca, Mexico. No. 

 73,382 $ ad., U. S. National Museum, Biological Survey Collection. 

 Collected June 20, 1895 by E. W. Nelson and E. A. Goldman. Original 

 No. 8120. 



Characters. Similar to goldmani but smaller and much less black, 

 the head and back grizzled with fulvous,, nose and ankles dusky by con 

 trast; hind feet and tail decidedly shorter; rostrum broader, broadening 

 gradually to zygomata with much less of the usual notch. Contrasted 

 with griseus the animal is darker; skull heavier, broader, flatter, with 

 more strongly developed supraorbital beads. 



Measurements. Type specimen: total length 340; tail vertebrae 191; 

 hind foot 39. 



Heteromys griseus sp. nov. 



Type from Mountains near Tonala, Chiapas, Mexico. No. 76,062 $ 

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

 August 15, 1895 by E. W. Nelson and E. A. Goleman. Original No. 

 8339. 



Characters. Size large but smaller than goldmani; tail much longer 

 than head and body and nearly naked; general color grizzled grayish 

 brown; sole of hind foot naked, 6-tuberculate. 



Color. Upperparts drab, grizzled on head and back with black-tipped 

 hairs; underparts, upper lip and fore and hind feet white; ears without 

 white edging; tail dusky above, whitish beneath except near tip which 

 is dark all round; lateral line faint except on side of face where it ap 

 pears as a broad pale buffy-fulvous band. 



Cranial characters. Skull long and rather heavy, similar in general to 

 that of goldmani but slightly smaller and less massive, with narrower 

 and more arched braincase, and with less extreme development of 

 supraorbital ridges. 



Measurements. Type specimen: total length 325; tail vertebrae 186; 

 hind foot 38. 



