236 Mrs. A. Arnback-Christie-Linde on 



6. ?. 



mm. mm. 



Length, ear, outer margin 16 



„ ,, greatest breadth 8 



„ tragus, outer margin 8 



„ forearm 40 41 



3rd finger, metacarpus 34 



„ first phalanx 12 13 



„ 2nd phalanx 9 10 



4th finger, metacarpus 34 85 



„ 1st phalanx 11 



„ 2nd phalanx 8 



5th finger, metacarpus 33 



„ 1st phalanx 10 



,, 2nd phalanx 7 



Thumb, with claw 8 



Lower le°: 18 



Foot, with claws 11 



Other external characters. — Last tail-vertebra projects 

 beyond the membrane. The wing-membrane is attached to 

 the ankle. Calcaneum very long, reaching about two-thirds 

 the distance from the ankle to the last tail-vertebra. 



Claws rather long. The interfemoral membrane forms an 

 acute angle in the centre of its margin behind. 



Affinities. — According to Dobson *, who in his Catalogue 

 lias divided the genus Vespertilio (Myotis) into the two sub- 

 genera Leuconoe and Vespertilio, Myotis taiicanensis should 

 be referred to the former subgenus. Among hitherto known 

 species it seems to be nearest allied to M. adversus, as Dobson 

 has described it (/. c), but differs from that species chiefly 

 with regard to the premolars, which agree with those of 

 M. dryas, a near ally of M. adversus and lately described by 

 K. Andersen f. As regards the incisors, M. taiica/iensis 

 agrees with M. adversus and not with M. dry as. 



Ilab. Island of Formosa (Taiwan). 



This species and Myotis formosus are, so far as I know, 

 the only species of Myotis hitherto recorded from Formosa. 



Pipistrellus ahramus, Temm. 



11 <$ , 17 ?. Takao, Anping, Kagi, Formosa; May, 

 July, August, September, October, 1906-1907. 



The collection contains both adult and young specimens, 

 varying somewhat in the colour of the fur, which may 



* G. E. Dobson, ' Catalogue of the Chiroptera in the British Museum ' 

 (London, 1878). 



f Knud Andersen, ' Annali d. Mus. Civ. d. Storia naturale di Genova,' 

 ser. 3, vol. iii. (1907). 



