Mammals from the East Indian Archipelago. 253 



long as mi below, proportions very different from those stated 

 to occur in the allied species. 



Dimensions of the type (measured on the spirit-speci- 

 men) : — 



Forearm 61 mm. 



Head and body 68 ; tail 59 ; ear 21 ; tragus on inner 

 edge 9 ; third finger, metacarpus 54, first phalanx 24*5 ; 

 lower leg and hind foot (c. u.) 42*5. 



Skull: greatest length 21; basi-sinual length 16*3; 

 zygomatic breadth 14 ; palato-sinual length 10 ; front of 

 canine to back of m^ 9. 



Hah. Sabang, N.W. of Sumatra. 



Type. Adult female in alcohol. B.M. no. 23. 1. 2. 13, 

 Current number 91. Collected by Mr. G. Herman. 



Of the three fine bats above mentioned, the first described 

 — weberi — was placed by Jentink in Kerwoida ; but later, 

 when describing hartelsi, he founded a new genus — Chryso- 

 pteron— -for the two, largely on the differences their teeth 

 showed from those of Kerivoula. But I fail to see any 

 reason for distinguishing them from Myotis^ among which 

 there are several other species with the dried-leaf coloration, 

 while one of these — M. rufopictus — has the small premolar 

 even more reduced, being absent altogether above in the type 

 and only known specimen ; and the premolar is equally 

 reduced in M. formosus and M. sicarius^ the latter a species 

 without the dried-leaf coloration. 



At Dr. de Beaufort's suggestion I have named this beautiful 

 bat after its discoverer Mr. Herman, to whom the Amsterdam 

 Museum owes many valuable accessions. 



Among the latter there is also an example of a Pipistrel, 

 from Sabang, which I at first supposed to be new, owing to 

 its possession of a peculiar sac-like gland on the upper side of 

 the base of the tail. But further study, and the loan of 

 specimens from the Doria Museum, Genoa, showed that this 

 gland was characteristic of the male sex of Pipistrellus ma- 

 crotis^ as also of P. imbricatus of Java, kttckeneri of Borneo, 

 and lophurus of the Malay Peninsula. The appreciable 

 number of specimens of both imbricatus and Mtcheneri in the 

 Museum are almost all females, and the type of P. curtatas^ 

 Miller, said to be a synonym of macrotis, is also a female, so 

 that it has only been on the arrival of Mr. Herman's male 

 specimen of macrotis that I have been able to draw attention 

 to this striking sexual characteristic. 



P. lophurus was distinguished by its possession of a 

 glandular tuft without any idea that the same structure 

 occurred elsewhere. 



