1904.] NATURAL SCIENCES OF PHILADELPHIA. 433 



Color. — Above Prout's bro^^^l, the hair with sUghtly more than the 

 basal half white. Below between drab and wood brown, the hair 

 with the basal half white. Ears and uropatagium Front's bro^Ti, 

 endopatagium, mesopatagium and the greater portion of the ecto- 

 patagium clove brown. 



Skull. — Siinilar to that of M. icaterhousii, but slightly smaller. 

 Teeth. — Similar to M. icaterhousii, but narrower and not strongly 

 crowded ; second upper premolar separated from the first premolar by 

 a distinct space. 



Measurements. — Type: Total length 90.2 mm.; head and body 63.2; 

 ear 23; greatest width of ear 16; tragus 8.5; forearm 54.5; thumb 14.1; 

 third digit 92; tibia 23.5; foot 13; tail 27. 



Average of series: Total length [10] 93.8 mm. (90.2-103); head and 

 body [10] 60.6 (57-67) ; head [9] 26 (25.5-27.5) ; ear [10] 26.3 (23-29) ; 

 greatest width of ear [10] 18.5 (16-20.5); tragus [10] 8.8 (8-9.5); fore- 

 arm [10] 53.4 (52-54.5); thumb [10] 13.4 (12-15); third digit [10] 90.3 

 (88-94); tibia [10] 22.3 (21.5-24); calcaneum [9] 10.4 (9.2-12); foot 

 [10] 13.6 (12.2-16); tail [10] 33.1 (27-36). 



Type skull: Greatest zygomatic width 12.2 mm.; interorbital width 

 4.3; height at base of second premolar 4.1 ; breadth of brain-case above 

 roots of zygomata 9.5; width of palatal constriction 2.4; length of 

 palate 11; width of palate including teeth 7.8; greatest length of 

 mandible 16.5. 



Average of three skulls : Total length [2] 24.3 mm. (24.2-24.5) ; greatest 

 zygomatic width 12 (12-12.2); interorbital width 4.2 (4.1-4.3); height 

 at base of second premolar 3.9 (3.7-4.1); height of brain-case [2] 9 

 (9-9.1); breadth of brain-case above roots of zygomata 9.4 (9.4-9.5); 

 width of palatal constriction 2.2 (2.1-2.4) ; length of palate 9.9 (9.3-11) ; 

 width of palate with teeth 7.9 (7.8-8) ; greatest length of mandible 16.1 

 (16-16.5). 



Remarks. — This form rec|uires comparison with but one other, true 

 M. waterhousii, from which the compressed and spaced tooth-row will 

 readily distinguish it. The external characters are also of service, the 

 longer forearm and tibia and smaller foot being distinctive. From 

 M. ID. compressus and minor the characters given in the key will enable 

 one to separate it without difficulty. 



Specimens Exa?nined. — Twelve; one skin, eleven alcoholic indi- 

 viduals. 



Spanishtown, Jamaica. One [type]. (U. S. N. M.) 

 Kingston, Jamaica. One. (U. S. N. M.) 

 Jamaica. Two. (Biological Survey.) 

 Jamaica. Eight. (A. M. N. H.) 

 28 



