Myotis itc.from Ctnlral and Soiil/i America. .'543 



forearm and, very thinly, on (lie intcrfemoral membrane, 

 lef^s, and feet, General colonr, as nsual in this group, very 

 variable, varying from smoky greyish to buffy ; Ridgway's 

 " hair-brown " and " wood-brown " nearly represent two of 

 the phases. Individually the hairs are whitish, tipped with 

 some shade of brown. Face with four fairly well-marked 

 white streaks in the usual j)ositions. 



Skull smaller, lighter, and more delicately built thati in 

 A. glaucus, which it resembles in its general form, narrower 

 in tiie muzzle than in A. cinereus. 



Teeth closely similar in their proportions to those of 

 A. glaucus*, the molars of the broadened shape found in that 

 species, and therefore different from those of A. Rosenhergi, 

 in which also w.^, both above and below, is proportionally 

 very much smaller than m}. 



Dimensions of the type : — 



Forearm 38 millim. 



Skull : greatest length (approximate) 19 ; zygomatic 

 breadth 11*7; intertemporal breadth 4*5; mastoid breadth 

 9*5; palate, length %'6j breadth across molars 8"3 ; front of 

 upper canine to back of m.^ 6*2. 



Otiier dimensions of a specimen softened and placed in 

 spirit : — 



Ear, length 15, breadth from most convex point of inner to 

 most concave part of outer margin 9 ; third finger, meta- 

 carpal 3G, first phalanx 14, second phalanx 20 ; lower leg 17 ; 

 depth of intcrfemoral in centre 11. 



Hah. Bogava, Chiriqui, Panama. Altitude 250 m. 



Type. Male. B.M. no. 0. 7. 11. 19. Original number 47. 

 Collected 24th October, 1898, by Mr. H. J. Watson. Four 

 specimens examined. 



By the presence of the minute posterior lower molar this 

 species differs from the common Central- American A. cinereus 

 and its allies, and resembles the larger A. glaucus of Peru. 

 A. Rosenhergi, of which the only known specimen has this 

 tooth on one side and not on the other, may be distinguished 

 by the different proportions of its molars. 



Sylvilagus surdaster, sp. n. 



A dark-coloured hare with very short blackish ears and 

 minute bullje. 



Size about as in S. Gabbi, which appears to be the 

 nearest ally. Fur thick, close, and rather liarsh, the longer 

 hairs of the back about 20 millim. in length. General colour 



* Described and tipured. V. Z. S. 1893, p. 030, pi. xix. figs. 7-9. 



