328 VESPERTIMONIDJE. 



4:2. Vespertilio arsino'e. 



Vespertilio arsinoe, Temmhick, Monogr. Mammal, ii. p. 247 (1835- 

 1841). 



Appears to be quite intermediate between V. nigricans and V. 

 albescens, resembling the former in the shape of its ears and in size, 

 the latter in the form of the tragus, in the larger feet, free extre- 

 mity of the tail, and in the peculiar colour of the fur. Ears shorter 

 than the head ; laid forwards their extremities do not reach the end 

 of the muzzle ; inner margin of the conch convex, outer margin 

 concave in upper half, becoming gradually convex in the lower half ; 

 tip rounded off, slightly projecting outwards : tragus rather short 

 and straight, subacutely pointed, not attenuated towards the tip. 



Wings from the base of the toes ; feet intermediate in size be- 

 tween those of V. nigricans and V. albescens ; calcaneum termi- 

 nating in a projecting tooth ; the last osseous caudal vertebra free. 



Fur very similar in surface colour to that of V. albescens, but 

 darker above, the hairs being ahnost black, the extreme tips on the 

 shoulders and back shining yellowish ; beneath, dark brown or 

 black at the base and for three fourths the length of the hairs, the 

 terminal fourth of the hairs on the chest and abdomen, and the ter- 

 minal half of the fur about the pubis and thighs, ashy. 



Both the first and second upper premolars stand in the tooth-row, 

 and the second is visible from without. 



Length (of the type specimen), head and body about 1"'7, tail 

 l"-3, ear 0"-5, tragus 0"-25, forearm l"-35, thumb 0"-28, third 

 finger— metacarp. l"-25, 1st ph. 0"-48, 2nd ph. 0"-7 ; fifth finger— 

 metacarp. 1"-15, 1st ph. 0"-35, 2nd ph. 0"-25; tibia 0"-6, foot 

 0"-3. 



Hab. Surinam. Type in the collection of the Leyden Museum. 



43. Vespertilio lucifngus. 



Vespertilio lucifugus, Leeonte, Cuvier, Aniin. Kingd. (ed. M'Murtrie), 



i. Append, p. 431 (1831) ; AUen, Monogr. Bats N. Atnerica, p. 55, 



figs. 51, 52 (1864). 

 Vespertilio brevirostris, Wied, Verz. heohach. Sdugeth. N.-America, 



p. 19 (1862). 

 Vespertilio affinis et yumanensis, Allen, Monogr. Bats N. Atnerica, 



pp. 53 & 58, figs. 49, 55 (1864). 



Head slightly and abruptly elevated, forehead depressed ; glan- 

 dular prominences of the sides of the face rather largely developed 

 laterally, causing the muzzle to appear obtuse in front. Ears 

 shorter than the head ; laid forwards the tips extend within a short 

 distance from the end of the muzzle ; lower third of the inner 

 margin faintly concave, the upper two thirds convex, the tip evenly 

 rounded off continuously with the convexity of the inner margin ; 

 upper third of the outer margin slightly concave, the tip scarcely 

 projecting, the middle third becoming gradually and very slightly 

 convex. Tragus rather short and acutely pointed ; inner margin 



