1904.] Allen, Mammals from Tropical America. 37 



triangular area 50 mm. wide and 75 mm. long, the apex pointing back- 

 ward ; but the outline is often more or less irregular. 



Measurements. Type, total length, 1016; tail, 381; hind foot, 114. 

 In 8 adult specimens, all from the vicinity of Bonda, the external 

 measurements are as follows: 



14860, $, Total length, 1133; tail vertebrae, 356; hind foot, 102. 



14630, $ , 1080; " 449', " " 92. 

 15472, * , 1044; " " ; " 



15471, $, 1016; 446; 89. 



14629, $ juv. " 991; 394; " " 102. 



14861, $ , 953; " 381; " " . 

 15469, $, 1016; 381; " " 104. 



14631, ? ?, 750; " 330; " " 89. 



The skull of the type measures: Occipito-nasal length, in; basal 

 length, 106.5; zygomatic breadth, 59; width of braincase, 47 ; post- 

 orbital constriction, 21.5 ; interorbital breadth, 25.5; upper toothrow, 

 (imperfect). Another old male skull, with practically the same 

 dimensions (about a millimeter less) , has the upper toothrow 2 2 . The 

 females are somewhat smaller. 



Represented by 10 specimens, 8 of which are adult and 2 

 rather young, all collected at or in the immediate vicinity of 

 Bonda (altitude 250 feet), Santa Marta district, during the 

 months of February, March, April, June, August, and No- 

 vember, all seasons being thus represented. They vary but 

 little in general color, but one or two are rather darker than 

 the others. Singularly enough, 7 of the 10 specimens have a t 

 whitish patch on the 'withers,' but it varies greatly in size, 

 from a mere trace to a large spot, as follows: 



No. 14861, $ , an oval spot on the left side of the median line, 20 

 mm. long by 5 mm. wide. 



No. 14629, $ , a diamond-shaped spot, 40 x 40 mm. 



No. 15471, $ , a triangular spot, with the apex directed backward, 

 46 mm. across the front, and 45 in length. 



No. 14630, $ ?, a triangular spot, as in the last, 40 x 45 mm. 



No. 14860, $ ?, a subtriangular spot, with the right anterior angle 

 lengthened, 38 x 49 mm. 



No. 14631, $ ?, a patch of very irregular form, 50 mm. wide by 75 

 mm. long. 



No. 15470, $ , a crescentic patch, opening forward, 95 mm. across 

 from point to point, and 125 mm. long, measured from a transverse line 



