214 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. X. 



Eumops bonariensis Peters. 



Twenty-nine specimens, Trinidad. 



These agree very closely with the original description of this species 

 as well as with specimens from east-central Brazil. No comparison 

 with specimens from Argentine or Paraguay has been possible. 



Saccopteryx bilineata Temminck. STRIPED BAT. 

 Seven specimens, Porto Velho, Brazil. 



Myotis nigricans Maximilian. BLACKISH BAT. 



One hundred and twelve specimens. Junction of San Antonio and 

 Espirito Santo rivers (25), Todos Santos (77), Trinidad (10). 



The name nigricans is here used in the inclusive "blanket" sense. 

 Should an east Bolivian form of this group prove recognizable the name 

 hypothrix* will be available and these specimens may perhaps be re- 

 garded as typical. 



Leontocebus weddelli Deville. WEDDELL'S MARMOSET. 



One specimen, Porto Velho, Brazil. 



So far as can be judged from descriptions alone, this specimen is 

 typical of this species. The white frontal marking is well developed. 

 The hind feet are not wholly black but have considerable mixture of 

 chestnut. 



Gallicebus donacophilus D'Orbigny. TITI MONKEY. 



Two specimens, Todos Santos. 



These are almost wholly russet brown on the upper parts, the hairs 

 being faintly annulated with darker and without any distinct grayish 

 areas. The hands and feet and tail are abruptly grayish in sharp 

 contrast. The median under parts and the inner sides of the legs are 

 bright clear tawny. 



Callicebus caligatus Wagner. TITI MONKEY. 



One specimen, Porto Velho, Brazil. 



Without material for comparison, it is difficult to make positive 

 identification of this specimen. It seems probable that it may be 

 intermediate between C. caligatus and C. brunneus and may be referred 

 tentatively to the former. The tail is mostly dark brown superficially, 

 but the hairs are light at the base and finely specked or annulated with 



*D'Orbigny & Gervais, Voy. Am6r. M6rid., IV, Mamm., p. 16, 1847. 



