i i ' 



APRIL, 1914. MAMMALS OF NORTHERN PERU OSGOOD 183 



Molossops milleri * sp. nov. 



Type (skin) from Yurimaguas, Peru. No. 19562 Field Museum of 

 Natural History. Female adult. Collected Sept. 30, 1912, by M. P. 

 Anderson. Orig. No. 61. 



Characters. Size small, smaller than any previously described 

 species of Molossops; color dark without whitish markings ; pelage short 

 but very soft and silky; patches of fur well developed on inner proximal 

 and outer distal sides of forearm and across wing membrane to and 

 covering the middle third of the metacarpal of the fifth digit. General 

 characters about as in M. planirostris. 



Color. Upper parts dark glossy blackish brown, the hairs of the 

 middle of the back with pale brownish fawn bases, those of the head 

 and sides nearly or quite self-colored; under parts decidedly paler, 

 Prout's brown to mummy brown, the throat and breast rather paler 

 than the abdomen and sides. 



Skull. Anteorbital or lachrymal breadth decidedly less than half 

 of basal length and evidently less than in related forms; braincase broad 

 and bulging laterally, depressed medially and without suggestion of a 

 sagittal crest; palate moderately domed, slightly concave longitudinally 

 as well as laterally. 



Measurements. Type, measured in the flesh by the collector: 

 Total length 83; head and body 57; tail 26; foot 6.5. Additional 

 measurements from dry skin: Lower leg 10; forearm 29; third digit, 

 metacarpal 29.7, first phalanx 13.2; second phalanx n. Skull of type: 

 Greatest length 16; basal length 14.7; zygomatic breadth 10.5; ante- 

 orbital or lachrymal breadth 6.5; postorbital constriction 4.4; breadth 

 of braincase 8.4; breadth of anterior nares 2.7; front of canine to back 

 of last molar 6. 



Remarks. The dark color of this species renders comparison with 

 M . planirostris unnecessary and its small size distinguishes it from all 

 other species. I am indebted to Mr. Oldfield Thomas for making direct 

 comparison of the type of M. milleri with that of M. p. paranus. 



Mormopterus kalinowskii (Thomas). KALINOWSKI'S BAT. 



One specimen, Hacienda Limon, near Balsas, Maranon River. 

 Except in certain larger dimensions, this specimen, an adult female, 

 agrees with the original description of the type. It possesses a well- 



*For Mr. Gerrit S. Miller of the U. S. National Museum. 



