488 Bulletin American Museum of Natural History. [Vol. XXII. 



geal epiphyses are still free, have the same length of forearm as the 

 adults 32 (31-33, with one very young one at 29) mm. The speci- 

 mens were collected as follows: Porten, 21 specimens, July 4; Rinsui, 

 5 specimens, July 2; Rintoi, i specimen, July 2; Manrun, i specimen, 

 June 20. 



P. portensis is nearest P. tennis, and is therefore quite different from 

 P. ridleyi Thomas, from Selangore, Malay Peninsula, which, accord- 

 ing to the description, is much smaller (forearm 28 instead of 32 mm.), 

 and has quite different ears and dentition. In the latter respects, P. 

 portensis closely resembles P. tenuis, from which it differs in larger 

 size (forearm 32 instead of 26.7 mm.) and in smaller ears, and doubtless 

 in other respects. It differs from P. abramus, as described by Dobson, 

 in smaller size, darker color, and in having the inner upper incisor 

 shorter instead of longer than the inner cusp of the outer incisor. 



37. Myotis davidii (Peters). 



One specimen, Rintoi, July 2. 



This specimen agrees very closely with the description by Peters 

 and Dobson of M. davidii (type locality, Pekin, China), differing in 

 being larger (forearm 34 instead of 31.5 mm.), and in the color of the 

 upperparts, which are nearly black frosted with whitish tips, instead 

 of fur "dark with light brown tips." It agrees with M. davidri in 

 having the wing membranes from the feet and a long calcaneum, in 

 the size and shape of the ears, and in the small size and internal position 

 of the second premolar in both jaws. It is quite probable that com- 

 parison of suitable material from the type locality and from Hainan 

 would show that the Hainan form is entitled to separation. 



38. Myotis abramus (Temm.). 



Vesperugo abramus SWINHOE, P. Z. S., 1870, p. 227. 



Swinhoe says: "I only procured one small Bat at Hainan the 

 species which roosted under the eaves of the house in the city wherein 

 I was quartered. Dr. Peters, of Berlin, has kindly determined the 

 species. It is a common House-bat in Nagasaki, Japan. " 



On this basis Myotis abramus is here included. 



39. Macacus rhesus (Audebert). 



Macacus erythrceus SWINHOE, P. Z. S., 1870, pp. 226, 615. 

 One specimen, skin and skull, adult male, Heuron, Hainan, May 

 10, 1904. 



