ose BANGS — SANTA MARTA MAMMALS 93 
Type locality: Merida, Venezuela. 
Twelve specimens, young and adults, from Macotama and San 
Miguel. 
Specimens I sent to Dr. Thomas were pronounced by him 
exactly like his O. merdensis in every particular. Dr. Thomas 
has also told me that he now finds his O. childi from Bogota 
inseparable even subspecifically from that species. It was 
originally based on youngish specimens; later he received fully 
adult specimens from Bogota, and these proved the characters 
thought to distinguish ciz/di to be worthless. He sent me a fine 
adult topotype of O. chi/di; this specimen I cannot distinguish in 
any way from my Santa Marta examples. . 
The color of the under parts in this species is very variable. 
This region may be pure white, or may be nearly wholly grayish, 
but it is usual to find two large white blotches, one pectoral, the 
other ventral, with grayish between them and grayish under the 
chin. Dr. Thomas told me he had one skin in which the belly 
was washed, all over, with rufous-buffy. 
Oryzomys laticeps (Lund). 
Fifteen specimens from Pueblo Viejo and Palomina. While 
these may not be and probably are not true O. /aticeps (Lund), 
they belong to that series. This wide-ranging group of closely 
related forms stands in great need of revision, for many names 
have been proposed for various members of it, from QO. couesi 
Alston, of Guatemala and Honduras, to Brazilian and Peruvian 
forms. I preferred not to add to the confusion by giving a name 
to the Santa Marta animal, not knowing what its real relationship 
might be to some of the forms already named. Dr. Allen pro- 
poses three new names for mice, apparently of this group, from 
the Santa Marta District —O. moliipilosus, O. magdalene, and O. 
villosus — on, what seem to me, very slight differences. 
Dr. Thomas wrote me, when I sent him some of the Santa 
Marta Mountains specimens, that it would be impossible at present 
to refer this form definitely, and that he was putting aside all 
specimens he received of this difficult group until such time as 
he should have material enough to review it intelligently. It is 
