BANGS: CHIRIQUI MAMMALIA. 19 
Marmosa mexicana (Merriam). 
Four specimens, an old adult ¢ from Boquete, 4,000 feet, and three young 
from Bogaba, 600 feet, February and July. 
These appear to be identical with specimens from Southern Mexico, States 
of Chiapas and Vera Cruz. The old ¢ is much larger than any Mexican 
example I have seen, bnt is much older also, and the differenee in size seems 
to be wholly due to age. MM. mexicana is a very distinct species, differing 
from the South American forms of the 1. murina series in its reddish chest- 
nut coloring, without olive shades, and certain cranial characters; the nasals 
are short and truncate posteriorly, the interorbital region wide, the supraorbi- 
tal beading slight; a still more marked character is the two parallel temporal 
ridges, extending the length of the brain case and ending one on each side of 
supraoccipital. 
M. mexicana is wholly different from M. fulviventer, lately described by me 
from San Miguel Island, Bay of Panama. 
The old adult ¢ No. 10,154, measures, total length, 370 ; tail vertebra, 195 ; 
hind foot, 25 ; ear, 25. Skull, basal length, 38.4; occipitonasal length, 41 ; 
zygomatic width, 22.2 ; length of nasals, 17.8. 
Caluromys laniger pallidus (Txomas). 
Type Locality. — Bogaba, Chiriqui. 
Six adults, both sexes. Bogaba and Divala, November, December, and 
July. 
Metachirus fuscogriseus ALLEN. 
Four adults, both sexes, Boquete, 4,500 feet, and Bogaba, March and July. 
These specimens are referable in every way to Dr. Allen’s species, the type 
locality of which was not known. Dr. Allen, however, later refers Nicaraguan 
examples to it; thus the range of M. fuscogriseus extends certainly from 
Nicaragua to Chiriqui. The largest individual, No. 10,146, ¢ old adult, 
measures, total length, 620; tail vert., 315; hind foot, 47; ear, 33. 
Didelphis richmondi ALLEN. 
Type Locality. — Greytown, Nicaragua. 
Six adults, both sexes, Boquete, 4,000 to 5,800 feet, March. 
Dr. Allen now refers Costa Rican specimens, that he formerly called 
D. aurita, here. Mr. Brown’s record carries the range of the species a little 
farther south. All the examples agree in every way — size, color, color pattern, 
skull characters — with Dr. Allen’s description. 
