120 Merriam New Mice from Mexico and Guatemala. 



Cranial characters. Skull similar to that of auritus, but audital bulke 

 larger; nasals longer and more pointed posteriorly (exceeding pre- 

 maxillae), and incisive foramina less broadly open. Similar to gutitt mn- 

 lensis, but frontal very much broader between orbits and with a distinct 

 supraorbital bead. 



Measurements. Type specimen : Total length 288 ; tail vertebrae 148 ; 

 hind foot 30.5. Average of 4 specimens from type locality : Total length 

 281 ; tail vertebra 148 ; hind foot 31.5. 



Peromyscus comptus sp. nov. 



Type from Mta. near Chilpancingo, Guerrero, Mexico. No. 70191, 

 $ ad., IT. S. Nat. Mus., Biological Survey Coll. Collected Dec. 24, 1894, 

 by E. W. Nelson and E. A. Goldman. Orig. No. 7266. 



Characters. Size rather large ; ears large ; tail rather long and scantily 

 haired ; fur long and relatively harsh ; color in winter pelage bright 

 golden-fulvous. Similar to P. auritus, but pelage coarser and color much 

 more fulvous, with much less blackish on nose and side of face, and much 

 whiter belly. 



Color. (Adults in Dec.) : Upper parts from nose to tail rich golden- 

 fulvous, the back and rump liberally lined with black hairs ; black on 

 nose reduced to a very small spot on top and a spot at base of whiskers ; 

 blackish ring round eye very small ; under parts milk-white, sometimes 

 tinged with yellowish ; wrists and ankles dusky ; fore feet white ; hind 

 feet whitish, more or less clouded ; tail dusky above, whitish below. 



Cranial characters. Skull like that of auritus, but rostrum and nasals 

 shorter, the latter less pointed behind ; molars slightly smaller. 



Measurements. Type specimen : Total length 285 ; tail vertebrae 150 ; 

 hind foot 31. Average of 10 specimens from type locality : Total length 

 273; tail vertebrae 143; hind foot 30.4. 



Peromyscus mexicanus totontepecus subsp. nov. 



Type from Totontepec, Oaxaca. Mexico (alt, 6500 ft. ). No. 68624, ad., 

 U. S. Nat. Mus., Biological Survey Coll. Collected July 16, 1894, by E.W. 

 Nelson and E. A. Goldman. Orig. No. 6465. 



Characters. Similar to P. mexicanus, but larger and darker, with slightly 

 shorter ears and denser fur. 



Color. Upper parts dusky brown becoming dull fulvous-brown on 

 cheeks and sides ; under parts whitish, the plumbeous basal fur every 

 where showing through ; a salmon pectoral patch sometimes present ; 

 fore feet whitish ; ankles and basal part of hind feet dusky, rest of hind 

 feet whitish ; tail dusky above, irregularly whitish or yellowish below. 

 According to season, the prevailing color varies from dull fulvous-brown 

 to dusky with a blackish dorsal area. 



Cranial characters. Skull like that of mexicanus, but interparietal and 

 audital bulhe averaging larger, and anterior root of zygoma even less 

 notched by anteorbital slit. 



Measurements. Type specimen : Total length 261 ; tail vertebrae 136 ; 



