442 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



Geographic distribution. — Known only from Nias Island. 



Diagnostic characters. — A small form of Myotis muricola. (Com- 

 parison with Sumatran examples.) 



Color. — Fur of upperparts cinnamon-brown, the blackish-brown 

 bases of the hairs showing through to a moderate extent ; f m* of imder- 

 part avellaneous, almost whitish imder chin ; dark bases of the hairs 

 of miderparts show through to a very considerable extent; mem- 

 branes varying between natal and bone-brown; ears, tawny olive. 

 The color of Myotis niasensis is distinctly lighter than that of either 

 M. muricola or M. abbotti. 



SJcull and teeth. — Compared with the skull of M. muricola (Suma- 

 tran specimens) that of M. niasensis is distinctly smaller, though it 

 has the same general shape; it lacks the roundness of braincase seen 

 in M. ahhotti and the angularity of the rostrum. 



Measurements. — Type, paratype No. 121877 and an average speci- 

 men, No. 141134 of Myotis muricola from Tarussan Bay, Simiatra: 

 Forearm, 31.2, 31.5, 34.5; tibia, including foot, 19, 18.5^ 22.5; tibia 

 alone, 14, 13.5, 16.4; ear from crown, 10.2, 9.8, 11; condylobasal 

 length of skuU, 12.6, 12.4, 13.3; width of braiacase, 6.3, 6.4, 6.6; 

 interorbital constriction, 3.2, 3.2, 3.2; maxillary toothrow, including 

 canine, 4.6, 4.8, 5.2. 



Remarlcs. — Myotis niasensis is a well-marked form of Myotis muri- 

 cola but less highly differentiated than the Myotis from Pagi Islands. 

 It is easily distinguished from the parent form by its smaller external 

 cranial and dental measurements, and by its lighter color. 



Order CARNIVORA. 



Family VIVERRIDAE. 



PARADOXURUS HERMAPHRODITUS ENGANUS, new subspeciss. 



1894. Paradoxurus hermaphroditus, Thomas, Ann. Mus. Civ. Stor. Nat., 



Genova, ser. 2, vol. 14, p. 105. 

 1906. Paradoxurus hermaphroditus, Miller, Proc. U. S. Nat. Mus., vol. 30, 



p. 820, June 4, 1906. 



Type-specimen. — No. 141026, U.S.N.M., skin and skull of adult 

 female (maxillary teeth much worn), collected on Engano Island, 

 November 11, 1904, by Dr. W. L. Abbott; original number 3782. 



Geographic distribution. — Engano Island. 



Diagnostic characters. — A small form of the widely ranging Para- 

 doxurus hermaphroditus, its size the same as that of P. hermaphro- 

 ditus parvus, but distinguished by a less rounded brain case, somewhat 

 smaller teeth, a longer (antero-posteriorly) upper canine, and prob- 

 ably by brown or Ughter colored hind feet. 



Color. — ^Aside from the feet the color of Paradoxurus hermaphro- 

 ditus enganus does not differ from that of P. h. parvus. The single 



