1904.] Allen, Mammals from Tropical America. 77 



externally blackish brown, much darker than the surrounding pelage; 

 limbs dull yellowish brown, slightly darker on the toes; tail similar in 

 color to the back, slightly darker above toward the base and termi- 

 nally, dull yellow below; ventral surface of body centrally deep 

 ochraceous orange, lighter, clearer yellow on the sides. 



Measurements. Total length, 1123; head and body, 572; tail ver- 

 tebrae, 551; hind foot (in skin), 76; ear, 45. Skull, occipito-nasal 

 length, 92; basal length, 82; zygomatic breadth, 59; interorbital , 21; 

 width of braincase, 39; length of palate, 37.5; upper premolar-molar 

 series, 19; lower premolar-molar series, 20; length of lower jaw, 62; 

 height at condyle, 28; height at coronoid, 45.5. 



The palate is thinned out posteriorly, but scarcely at all depressed; 

 teeth very small; audital bullae large and much inflated, very much 

 larger and much more swollen than in any of the northern forms of 

 the genus. The specimen is old, with well-developed sagittal and 

 occipital crests; the sex is given as " $ ?", and is probably male. 



The cranial characters separate this subspecies quite 

 sharply from the northern forms, and the coloration is rather 

 peculiar in the deep orange ochraceous tint of nearly the 

 whole ventral surface, and the absence of the strong dorsal 

 streak seen especially in P. f. meridensis, modestus, and cau- 

 censis, and, according to Thomas, in flavus. 



36. Nasua narica panamensis Allen. One specimen, adult 

 female, Boqueron, Oct. 29. Total length, 1080; head and 

 body, 540; tail, 540; hind foot, 85. 



I am indebted to Mr. Bangs for the opportunity to examine, 

 in this connection, his series of 6 specimens from Boquete. 

 While they agree in color with bullata, they lack the exces- 

 sive development of the audital bullae seen in that form, as 

 already noted (antea, p. 51). 



37. Procyon lotor hernandezii (Wagler). One specimen, 

 female, Boqueron. 



38. Myotis nigricans (Wied). Two specimens, Boqueron. 



39. Myotis chiriquensis, sp. nov. 



Type, No. 18736, ? ad., Boqueron, Chiriqui, Panama, Oct. 16, 

 1901; J. H. Batty. Represented by three specimens, taken at the 

 same locality and date. 



Size very small, smallest of the known American species of Myotis; 

 pelage thick, soft, and rather short. 



