178 PEROMYSCUS. 



orbital constriction, 4; interparietal, 8x2.3; length of nasals, 9.3; 

 palatal length, 4; palatine slits, 4.2 x 19; diastema, 6.2; postpalatal 

 length, 9.5; upper molar series, 3.5." 



131. labecula (Peromyscus) , Elliot, Pub. Field Columb. Mus., in, 



1902, p. 143. Zoology. 

 WHITE-SPOT DEER MOUSE. 



Type locality. Ocotlan, State of Jalisco, Mexico. 



Genl. Char. Similar to P. thurberi in color, but cranial characters 

 very different ; tail short ; skull with braincase more nearly square- 

 shaped than that of P. thurberi, outer edge of frontals more curved ; 

 interorbital constriction greater ; nasals shorter and broader anteriorly ; 

 palatine foramina shorter and narrower; pterygoids shorter; maxil- 

 lary branch of zygoma broader and heavier; pelage soft, thick. 



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 black, sides and beneath white. 



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

 Skull: greatest length, 25; Hensel, 20; zygomatic width, 13; mastoid 

 width, ii ; length of nasals, 10; greatest width of rostrum, 4; palatal 

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



132. cecilii (Peromyscus), Thomas, Ann. Mag. Nat. Hist., 7th Ser., 



xi, 1903, p. 486. 

 CECIL'S MOUSE. 



Type locality. Santa Barbara Camp, southern slope of Mt. Ori- 

 zaba, State of Vera Cruz, Mexico. Altitude, 12,500 feet. 



Genl. Char. Size small; ears medium; tail heavily haired. 



Color. Upper parts dark grayish fulvous, dorsal area heavily 

 lined with black; sides dull fulvous brown; under parts dull gray; 

 tail black above, white on sides and beneath; hands and feet dull 

 whitish, ankles dusky; ears black with white edges. 



Measurements. Total length, 169; tail vertebrae, 75; hind foot, 

 20; ear, 18. Skull: greatest length, 26.5; basilar length, 20; nasals, 

 11X3; interorbital constriction, 3.9; palatal length, 10.9; palatal 

 foramina, 5.8x2; length of upper molar series, 3.7. 



133 melanotis (Peromyscus), Allen & Chapman, Bull. Am. Mus. 



Nat. Hist., 1897, p. 203. 

 BLACK-EARED FIELD MOUSE. 



Type locality. Las Vigas, State of Vera Cruz, Mexico. 



Geogr. Distr. State of Vera Cruz, Mexico. 



