BANGS: CHIRIQUI MAMMALIA. og 
Reithrodontomys costaricensis ALLEN. 
Thirty specimens, Boquete, 4,000 to 6,000 feet, January, February, April, and 
June. 
_ I have compared this series with specimens from the type locality — La Car- 
pintera, Costa Rica— loaned by Dr. Allen, and cannot find that the Chiriqui 
animal is at all different. They vary a good deal individually in color, rang- 
ing from strong brownish orange rufous, without darker dorsal band to 
raw umber with darker dorsal band: below the color ranges from white to dull 
fulvous. Young individuals are always darker and duller than adults. 
R. costaricensis was one of the commoner small mammals of the forest belt 
of the Volcan de Chiriqui. 
Reithrodontomys creper,! sp. nov. 
Type. — Mus. Comp. Zodl., No. 10,284 ad. 9 Volcan de Chiriqui, June 2, 1901. 
11,000 feet. 
Characters. — Belonging to a peculiar group of large-sized species with curi- 
ous bird-like skulls, —very long slender rostrum and large round brain case. 
Pelage exceedingly long, dense, and silky; colors all very dark; hind foot very 
— 
ISN SCRE. 19. 
x 13. 
Figs. 18 ann 19. Retthrodontomys creper. Type. 
large; tail, long. (Dr. Merriam has lately described several species of this 
group from Mexico. These should properly, I think, have a subgeneric name. 
None of them, however, are closely related specifically to the present one.) 
Color. — Upper parts, middle of back, bistre, shading on sides to raw umber; 
face rather more dusky, especially about eyes and at base of whiskers: under 
parts dark cinnamon, without marked line of demarcation, but shading grad- 
1 Creper, dusky, dark. 
