114 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXII. 



Average cranial measurements, in millimeters, of specimens of Ileiniderma jierspicillatum 



aztecum. 



HEMIDERMA SUBRUFUM Hahn. 

 Hemiderma subrufum Hahn, Proc. Biol. Soc. Wash., XVIII, Dec. 9, 1905, p. 247. 



Type-locality. — Santa Ifig'enia, near the west coast of Oaxaca, 

 Mexico. (Tj^pe-specimen, skin and skull, Cat. No. 75, 127, U.S.N.M., 

 Biological Survey Collection.) 



Geographic distribution. — Southern Mexico. Limits of distribu- 

 tion not known. 



Characters. — Size intermediate between Hemiderma perspicillatwn 

 and H. castaneum (forearm about 39 mm.); skull small and short 

 (about 21) with a high, strongly arched brain-case; maxillary tooth- 

 rows with an angular curve between the premolars so that, they are 

 strongly divergent posteriorly; second premolar with a distinct pos- 

 terior process. 



Pelage. — The fur is short and sparse and rather coarse. "Ten 

 skins from the type locality are uniformly of a dark reddish-brown 

 color above. The individual hairs are ))anded as follows: A very 

 short (not over \ mm.) basal area whitish; next a wider band of dark 

 (near the clove brown of Ridgway) which is followed by another and 

 wider band of huffish white; succeeding this is the somewhat narrower 

 band of reddish prout's brown which gives to the animal its character- 

 istic color; hairs minutely tipped with whitish. Underparts similar, 

 but the bands of color less sharply marked off, the dark bands being 

 reduced and the pale areas suffused, making the general color paler 

 and duller." Specimens from near Yohaltun, Campeche, are slightly 

 darker, while some from Achotal, Vera Cruz, in the collection of the 

 Field Columbian Museum are more pallid, due to the fact that the 

 central pale band of the hairs is wider and the outer band of prout's 

 brown less reddish. The forearm is densely furred at the base, the 

 hairs becoming shorter and more scattered distally, but the fur is 

 more dense on the distal half than \\\ perspicillaturn or aztecum. Tibia 

 sparsely covered with short hairs. 



