VI VUM3VI 



182 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. X. 

 Myotis nigricans mundus (H. Allen). 



Vespertilio mundus H. Allen, Proc. Acad. Nat. Sci. Phila., p. 280, 

 1866 Type from Maracaibo, Venezuela. 



Vespertilio concinnus H. Allen, aupra cit., pp. 280-281 Type from 

 Salvador. 



Myotis nigricans concinnus Osgood, Field Mus. Nat. Hist., Pub. 155, 

 Zool. Ser., X, p. 65, Jan. 10, 1912. 



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



Although subsequent material may point to a different conclusion, 

 the only one justifiable at present is the reference of this specimen to 

 the form ranging southward from southern Mexico and for which the 

 name mundus seems available. In a former paper (supra cit.), I 

 referred a specimen from the vicinity of Maracaibo, Venezuela, to M. n. 

 concinnus, overlooking the fact that it is practically a topotype of 

 Vespertilio mundus of Harrison Allen. Since mundus has page priority 

 over concinnus, it will be necessary to use it, although its type unfortu- 

 nately has been lost. 1 That the description of mundus applies to the 

 same species as that of concinnus there can be little doubt, the measure- 

 ments being even smaller than those given for concinnus. 



Our specimen is slightly smaller than typical nigricans and even 

 paler, especially on the under parts, than typical mundus. Its skull 

 is somewhat larger than that of the Maracaibo specimen but has the 

 same general form. Both skulls differ from those of nigricans in having 

 a narrower rostrum and interorbital space, characters which may prove 

 to be of specific importance, but the disposition of the form as a sub- 

 species of nigricans for the present seems more convenient than any 

 other treatment. 



Myotis simus Thomas. 



A single specimen obtained at Yurimaguas by Mr. Anderson is 

 provisionally referred to this species, with the description of which it is 

 in essential agreement. 



Hyotis sp. 



A relatively large Myotis (forearm 41) with well-developed glandular 

 facial rugosities was obtained at Hacienda Limon. In the present 

 imperfect state of knowledge of South American vespertilionine bats, 

 its relationships are scarcely even conjectural. 



1 See Bull. 62, U. S. Nat. Mus., p. 290, 1909. 



