Goldman Descriptions of Five New Mammals from Mexico. 81 



Total length, 368 (355-390); tail vertebrae, 182 (166-198); hind foot, 37 

 (35-39). Skull of type : Greatest length, 48.4 ; basilar length of Hensel, 

 38.4 ; zygomatic breadth, 23.7 ; length of nasals, 19 ; interorbital breadth, 

 6.2; palatal length, 8.3; diastema, 12.9; upper molar series on alveolus, 9. 

 Specimens examined. Total number, 19, all from the state of Oaxaca, as 

 follows: Huilotepec (type locality), 16; Jucbitan, 3. 



Neotoma parvidens sp. nov. 



Typt from Juquila, Oaxaca, Mexico (altitude, 5000 feet). Adult female, 

 No. 71,586, U. 8. National Museum, Biological Survey Collection, Feb 

 ruary 27, 1895, E. W. Nelson and E. A. Goldman. Original number 

 7587. 



Characters. Size very small ; color ferruginous ; tail rather short and 

 slender, covered with short hairs ; ears small. Closely resembling N. picta 

 in color hut very much smaller; skull smaller and lighter, with narrower 

 nasals and smaller teeth. 



Color. Upper parts ferruginous (varying along sides in some specimens 

 to orange-rufons) of Ridgway, becoming brownish fulvous over outer 

 sides of forearms and hind legs; face, top of head, and back (in some 

 specimens the sides also) rather thickly sprinkled with black-tipped hairs ; 

 underparts, including upper lip and part of cheeks, nearly pure white, 

 the plumbeous basal color showing through indistinctly ; axillae orange- 

 rufous ; ears covered with short dusky hairs ; tail dusky above, paler 

 below ; fore feet and toes of hind feet yellowish white ; hind feet to toes 

 irregularly clouded with dusky (in two out of five specimens, pure 

 white). 



Sk'ilt. Similar in general form to that of N. tenuicauda, but smaller, 

 lighter, and usually more arched ; interorbital breadth relatively greater ; 

 rostrum usually moredecurved, nasals narrower and more wedge-shaped ; 

 teeth relatively much smaller. 



Measurements. Type: Total length, 295; tail vertebrae, 141 ; hind foot, 

 31. Average of five adult males and females from the type locality: 

 Total length 300 (282-317); tail vertebrae, 149 (141-157); hind foot, 31 

 (30-32). Skull of type: Greatest length, 40.5; basilar length of Hensel, 

 32.5; zygomatic breadth, 20.7; length of nasals, 15.2; interorbital 

 -breadth, 5.3; palatal length, 7.3; diastema, 11.3; upper molar series on 

 alvelous, 7.4. 



Specimens examined. Five, all from the type locality. 



Neotoma tropicalis sp. nov. 



Type from Totontepec, Oaxaca, Mexico (altitude, 6500 feet). Adult 

 male No. 68,593, U. S. National Museum, Biological Survey Collection, 

 July 17, 1894, E. W. Nelson and E. A. Goldman. Original number 6468. 



Characters. Size small ; tail rather short, slender, and thinly haired ; 

 ears rather small. In color closely resembling N. tenuicauda but brown 

 ish of upper parts encroaching on under parts; skull somewhat similar 



