466 Bulletin American Museum of Natural History. [Vol. XX, 



color in this series, which he considered due to individual 

 variation, as it was evidently not sexual. 



The Museum Collection contains 7 specimens from the 

 upper Cauca Valley (alt. 6000 feet), Colombia, collected by 

 Mr. J. H. Batty, which I also refer to A. kmurinus. They 

 include adults and young adults of both sexes, but unfortu- 

 nately only four of the skins are accompanied by skulls. 

 This series is exceedingly variable in details of coloration, 

 varying individually in the amount of rufous and black, as 

 described by Geoffrey. Yet it is impossible not to believe 

 that they all represent a single variable species. They show 

 essentially a close agreement with the topotype of A. lemu- 

 rinns in size, proportions, and in the prevailing features of 

 coloration. No. 14567, from Bond a, can be closely matched 

 by several specimens in the Cauca series, and is also not ap- 

 preciably different from the Bogota specimen. The other 

 (No. 15483, from Valparaiso) is paler and grayer, with the 

 ventral surface much paler and with much less rufous suffu- 

 sion pervading the general pelage. The Valparaiso specimen 

 is much more different from the Bonda specimen than the 

 latter is from several of the Cauca specimens, but there is one 

 Cauca specimen which closely resembles it. With larger 

 series from each of these three localities it might be possible 

 to distinguish a small amount of local differentiation in color 

 or other features, but the material at present available for 

 examination does not warrant such procedure. 



According to Mr Brown's flesh measurements of two speci- 

 mens taken by him at Santa Marta, near Bonda (Bangs, 

 Proc. New Engl. 2661. Club, I, p. 102), the length of the tail 

 vertebrae is considerably greater than half the total length; 

 in the Smith specimens and in the Batty specimens these two 

 measurements are equal. It is probable, however, that the 

 method of measuring was not the same in all three cases. 

 Spix says, "cauda corpore multo longiore," while his measure- 

 ments are: "trunci i' ij", caudae, i' 2" " which makes a 

 difference of only half an inch between the two measurements. 

 Adding the head "capitis 2 J" " makes the head and 

 body longer than the tail! In other words, the commonly 



