182 Frerp Museum or Natura History — Zod oey, Vor. 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, supra 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, Marafion 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.!. 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. 
llyotis 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. 
' See Bull. 62, U. S. Nat. Mus., p. 290, 1909. 
