118 Merriwm — New Mice from Mexico and Guatemala. 



hairs, the fulvous predominating on cheeks and sides; under parts, feet, 

 and tail as in P. zarhynchus. 



Cranial characters. — Skull similar to that of P. zarhynchus, hut slightly 

 shorter (averaging 30-31 instead of 32-33), with braincase broader and 

 zygomata stronger and more spreading anteriorly. 



Measurements. — Type specimen: Total length 322; tail vertebrae 170; 

 hind foot 34. Average of 10 specimens from type locality: Total length 

 312; tail vertebrae 166; hind foot 33.8. 



Peromyscus guatemalensis sp. now 



Type from Todos Santos, Guatemala (alt, 10,000 ft. ). No. 76861, tf ad., 

 U. S. Nat. Mus. , Biological Survey Coll. Collected Dec. 31, 1895, by E. W. 

 Nelson and E. A. Goldman. Orig. No. 8991. 



Characters. — Size medium (larger than mexicanus, but decidedly smaller 

 than zarhyncus) ; tail long and scantily haired; ears medium; furlong, 

 soft, and lax ; color very dark. 



Color. — Upper parts dusky, finely mixed with grayish; an ill defined 

 blackish band from side of nose to car; cheeks and flanks dull brownish 

 fulvous ; under parts white, the plumbeous basal fur showing through ; a 

 salmon fulvous pectoral patch ; wrists and ankles blackish ; fore feet 

 white ; hind feet dusky at base, then white ; tail dusky, irregularly paler 

 below (sometimes white or yellowish). Some specimens have the middle 

 part of the back nearly black and much blackish on nose. Specimens 

 from Pinabete, Chiapas, agree closely with those from the type locality. 

 Specimens from Calel, Zunil, and Volcan Santa Maria, Guatemala, are 

 somewhat paler. 



Cranial characters. — Skull and rostrum large and elongate, intermediate 

 in size between mexicanus and crislobalensis ; audital bullae as in the latter 

 (decidedly larger than in mexicanus). 



Measurements. — Type specimen: Total length 273; tail vertebra? 141; 

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

 268; tail vertebr;e 138; hind foot 30.5. 



Peromyscus leptuius sp. nov. 



Type from Mt. Zempoaltepec, Oaxaca, Mexico (alt, 8200 ft,). No. 6S612, 

 C? ad., U. S. Nat, Mus., Biological Survey Coll. Collected July 8, 1894, 

 by E. W. Nelson and E. A. Goldman. Orig. No. 6381. 



Characters. — A miniature of P. quatemalensis : size small (smaller than 

 mexicanus) ; ears medium and nearly naked ; tail about as long as head 

 and body, slender and rather scantily haired ; molars large; fur long and 

 rather soft ; color dark. 



Color. — Upperparts brownish with a broad dusky dorsal area, becoming 

 brownish-fulvous on cheeks and sides ; nose ami ring round eye dusky ; 

 underparts, fore feet, and small spot on end of nose whitish ; wrists and 

 ankles dusky; hind feet clouded with dusky, toes white; tail dusky 

 above, paler below. Other specimens are so much darker as to appear 

 dusky all over when seen from above, although the sides are always 

 more or less brownish. 



