292 VRSPEETILIONID^. 



the first and third premolars, and in vertical extent does not equal 

 the cingulum of either tooth ; the lower incisors are slightly crowded. 



Length (of an adult 2 preserved in alcohol), head and body 2"'], 

 tail l"-8, head 0"-65, ear 0"-6, tragus 0"-25, forearm 1""6, third 

 finger 2"-6, fifth finger 2", tibia 0"-65, foot 0"-45. 



This species, as Dr. Peters has remarked, was long considered 

 to belong to the genus Vesperugo, the extremely small second 

 premolar in both jaws having escaped notice. Although the second 

 upper premolar is very small in every species of Vespertilio, and 

 in some quite internal, yet in no other species is the second lower 

 premolar quite internal, placed in the angle between the closely 

 approximated first and third premolars, andi not sufficiently large to 

 fiU that angle. 



Hub. Malay peninsula ; Siam ; Sumatra ; Java. 



a. ad. sk. Java. Purchased; 



b. $ ad,, al. Burma. Secretary of State for India [P.]. 



4. Vespertilio adversus. 



Vespertilio adversus, Horsfield, Zoological Researches in Java (1824) ; 



Dobson, Monogr. Asiat. Chiropt, p. 128 (1870). 

 Vespertilio horsfieldi, Temminck, Monogr. Manmial. ii. p. 226 (1835- 



41) ; Wagner, Suppl. Schreb. Sdugeth. v. p. 737 (1865) ; Dobson, 



I. c. 

 Vespertilio macellus, Temminck, I. c. p. 230. 

 Vespertilio macropus, Gould, Mammals of Australia, iii. (1854). 



The ear laid forward extends to the end of the nose ; the inner 

 margin of the ear-conch is very similar in shape to that of V. 

 dasycneme, but there is a slight flattening in its upper third ; the 

 extremity is broadly triangular, with a rounded-off vertical angle ; 

 the upper half of the outer margin is straight, not at aU concave, 

 and the lower half very slightly convex, terminating opposite the 

 base of the inner margin ; tragus ver}- similar in shape to that of 

 v. daubentonii, but somewhat longer and narrower towards the tip, 

 the inner margin straight, the outer slightly convex, attaining its 

 greatest width slightly below the middle of the inner margin 

 (Plate XVIII. fig. 4, ear, enlarged). 



Wings from the ankles ; calcaneum very long, extending more 

 than three fourths the length of the posterior margin of the inter- 

 femoral on each side. 



The fur of the body extends upon the wing-membrane as far as 

 a line drawn from the middle of the humerus to the distal third of 

 the femur ; the base of the interfemoral between the thighs only is 

 covered, and a few long hairs appear on the backs of the toes. 

 Beneath, the wing-membrane is covered with a few fine hairs as 

 far as a line drawn from the elbow to the knee, but the interfemoral 

 is as naked as upon the upper surface. The face is more hairy than 

 in most of the species of this subgenus. 



The first upper premolar occupies the space between the canine 

 and the third premolar ; the second upper premolar is extremely 



