. ee eee ee 
APRIL, 1914. MAMMALS OF NORTHERN PERU — OsGoop 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 metaéarpal of the fifth digit. General 
characters about as in M. plantrostris. 
Color.— Upper parts dark glossy blackish ioe, 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 11. 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. plantrostris 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. millert with that of M. p. paranus. 
Mormopterus kalinowskii (Thomas). KALinowsk1’s Bart. 
One specimen, Hacienda Limon, near Balsas, Marafion 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. 
