FEB. 1903. MEXICAN MAMMALS ELLIOT. 143 



and rather slender, its greatest width being less than the least 

 interorbital width; the palatine foramina broad, their posterior 

 ends just reaching the anterior line of first premolar. Skulls of 

 all the specimens badly broken. Somewhat similar to P. gratus 

 in color, but larger in all its measurements. 



Color. Upper parts mixed buff and brownish black, palest 

 on hind neck; orbital ring black; lateral line from lip to rump 

 ochraceous buff; sides above it buff: under parts white tinged with 

 buff on chest; arms buff; legs and ankles dusky; hands and feet 

 white; tail above blackish or brownish black, beneath white; ears 

 brown. 



Measurements. Total length, 238; tail vertebrae, 130: hind 

 foot, 23; ears, 20. 



This large mouse in its rather light color, large ears and 

 long tail does not resemble very closely any of the named forms 

 that would naturally be arranged with it. It is a rather con- 

 spicuous species and would readily attract attention in a collec- 

 tion of these animals. Unfortunately the skuil is badly broken 

 and exact measurements cannot be given. 



Peromyscus *labecula. Sp. nov. 



Six specimens from Ocotlan, State of Jalisco. 



Type locality. Ocotlan, State of Jalisco, Mexico. 



Gen. char. Similar to P. thurberi in general color, but 

 cranial characters very different. Tail short. Skull as compared 

 with that of P. thurberi has brain case more square shaped; outer 

 edge of frontals more curved; interorbital constriction greater; 

 nasals shorter and broader anteriorly; palatine foramina shorter 

 and narrower; pterygoids shorter: maxillary branch of zygoma 

 broader and heavier. Pelage soft, thick, white spot at base of ear. 



Color. Above dark grayish fulvous, top of nose grayish buff; 

 conspicuous white spot at posterior base of ears; shoulders mixed 

 buff and black; lateral line from upper lip to thigh tawny 

 ochraceous: lips and under parts white; thighs like sides: arms, 

 hands and feet white; tail hairy, above blackish brown, sides and 

 beneath white; ears small, black edged with white. 



Measurements. Total length, 144; tail, 57; hind foot, 18. 

 (Skin.) Skull: greatest length, 25; Hensel, 20; zygomatic width, 

 13; mastoid width, n; length of nasals, 10; greatest width of 

 rostrum, 4; palatal length, 4; length of upper tooth row, 4. 



This little mouse resembles P. thurberi in its general hue, 

 although somewhat darker above, but is distinguishable from 



Labecula a small spot. 



