204 VESPERTILIONID^. 



moutli ; the inner margin with a rounded basal lobe, the ascending 

 part very convex in lower third, then sloping upwards and back- 

 wards. Tragus expanded above and slightly curved inwards ; the 

 outer margin has an acute triangular lobe at the base ; above this it 

 increases in convexity, and the tragus reaches its greatest width 

 about the middle of its outer margin ; the inner margin is straight 

 below and slightly concave above. 



Wings to the base of the toes ; thumbs and feet rather short ; a 

 distinct but shallow postcalcaneal lobe ; the last two caudal vertebrae 

 free. 



Fur, above, very dark brown, with yellowish-brown extremities ; 

 beneath, similar, with ashy tips. 



On the upper surface the fur of the body extends upon the wing- 

 membrane as far as a line drawn from the middle of the humerus to 

 the knee ; beneath, similar ; the base of the interfemoral, above and 

 beneath, is alone clothed. 



Inner upper incisors bifid ; outer incisors as long as the outer cusp 

 of the inner incisors, and equal to the latter in cross section at the 

 base ; lower incisers crowded, placed at right angles to the direction 

 of the jaws, trifid, the incisors next the canines rounded above and 

 higher than the rest ; first lower premolar small, not half the size of 

 the second premolar, which equals or nearly equals the canine in 

 vertical extent. 



The outer upper incisors, generally minute in the subgenus Ves- 

 perus, appear to reach their greatest development in this species. 



Length, head and body 2", tail 1""7, head 0""65, ear 0"'55, tragus 

 0""2, forearm l"-5, thii-d finger 2"'5, fifth finger 2", tibia 0""7, foot 

 0"-35. 



Hab. The northern part of the Palsearctic Kegion. In Europe 

 extending from the Scandinavian Peninsula (where, according to 

 Nilsson, it is found as far north as the Arctic Circle), through 

 Russia to the Ural Mountains, and southwards to the Harz Moun- 

 tains. As yet not recorded from the British Isles. In Asia in- 

 habiting the Altai Mountains and Northern China, extending as far 

 south as the northern slopes of the Himalayas, a single specimen 

 having been obtained by the late Dr. F. Stoliczka at Kizil. 



a. c? ad., al. China. R. Swinhoe, Esq. [P.]. 



h. ad. sk. Purchased. 



18. Vesperugo discolor. 



Vespertilio discolor, Natterer, KuU, Deutsch. Fledenn. Wetter. Ann. 



iv. (1819) ; Desm. Mamm. p. 139 (1820) ; Bell, Brit. Quadm2}. 



p. 21, woodcut ; Temm. Monogr. Mammal, ii. p. 173 (1841). 

 Vespertilio serotina, Pallas, Zoogr. Bosso-Asiat. p. 123. 

 Scotophihis discolor, Gj-ag, 3Iag. Zool. 8f Bot. ii. p. 297. 

 Vesperugo (Vesperus) discolor, Keys. ^ Bias. Wirbelth. EiM-op. p. 50 ; 



Faun. Deutschl. p. 73, figs. 49 & 50 (1857) ; Dobson, Monogr. Asiat. 



Chiropt. p. 106 (1876). 

 Vesperus discolor, Wagner, Suppl. Schreb. Sdugetk. v. p. 733 (1865). 



Head broad and flat ; muzzle obtuse, the glandular prominences 



