98 BANGS — SANTA MARTA MAMMALS [voce 
Santa Marta Mountains specimens are all rich brown above, very 
near to the color called “ bistre”’ by Ridgway. 
Sigmodon sanctzemartez Bangs. 
Sigmodon sanctemarte Bangs, Proc. Biol. Soc. Wash., Vol. XII, 
pp. 189-190, Dec. 30, 1898. 
Type locality: Pueblo Viejo, 8000 feet altitude, Colombia. 
Twenty-eight specimens from Pueblo Viejo, Palomina, San 
Sebastian and El Mamon, La Concepcion, and San Antonio, 
Very little variation is shown in this fine series. The female from 
Pueblo Viejo that I mentioned in my description of the species as 
being very small, I now believe to have been dwarfed by an 
injury to the basal portion of the skull, probably received in 
youth. 
Heteromys melanoleucus Gray. 
Fleteromys jesupi Allen, Bull. Amer. Mus. N. H., Vol. XII, pp. 
201-202, Dec. 20, 1899. (Minca, 1000 feet altitude, Santa Marta 
District, Colombia.) 
Twenty-four specimens from San Miguel, Pueblo Viejo, Palo- 
mina, San Francisco and Mamorungo, taken from January to 
July at altitudes ranging from 3000 to 8000 feet. 
Although in possession of this fine series for a year or more, 
I have been unwilling to separate the form found in the Santa 
Marta region, on account of its evident very close relationship to 
both 4/7. anomalus and H. melanoleucus. It may, however, be a 
slightly differentiated subspecies, though I do not now feel sure of 
this. Dr. Thomas compared specimens I sent him with Gray’s 
type, which is immature, and said that in his opinion the Santa 
Marta specimens and //. melanoleucus were one and the same. 
The color differences do not amount to much. My series shows 
a wide range in this respect. Some examples taken in July are 
exceedingly pale,— paler even than those described by Allen,— 
others killed in January are quite as dark as Trinidad skins, 
while two young ones from Palomina are nearly black above. 
Dark and pale individuals come from the same place and from 
equal altitudes. In measurements my series shows variation 
