Miller Three New Bats from the Island of Ct/rrtt<>. 127 



AW. The feet are large and strong, about two thirds length of tibia. 

 Toes essentially equal in length, slightly longer than metacarpals, armed 

 with large strong claws, the latter equal to about one third of rest of 

 foot. Calcar distinct, 6 mm. in length. 



/'/// titirl color. The fur is short, dense and velvety, that on middle of 

 buck about 4 mm. in length. It is closely confined to body, reaching 

 membranes in a very narrow line only. On humerus it extends over 

 proximal half both above and below. Dorsal surface of forearm densely 

 but inconspicuously furred. Under surface of forearm and of propata- 

 gium and both sides of uropatagium scantly haired. 



ColoY after three months immersion in formalin hair brown with a 

 faint bluish cast, slightly paler on ventral surface, the hairs everywhere 

 ecru drab at base. Ears and membranes dark brown. 



Skull. The skull is slightly larger than that of Leptonyoteru ninilix, 

 and the rostrum is a little deeper, but otherwise I can detect no cranial 

 characters to separate the two species. 



Teeth. Upper incisors large and evenly spaced, not in two pairs sepa- 

 rated by a distinct median gap as in L. nir<ilix. These teeth project so 

 strongly forward that the entire anterior face is visible when skull is 

 viewed directly from above. Maxillary teeth essentially as in L. niwtlix. 

 Lower incisors larger than in L. itiraU* the lateral pairs less widely sepa 

 rated. Second lower premolar distinctly crescentic when viewed from 

 its apex, the concavity directed inward. In L. -nivalis this tooth is 

 si might. Mandibular molars not peculiar. 



Mcaxurcnii'ntx. External measurements of type: head and body, 70 

 (7.))*; tibia, 20 (22): foot, 15 (14.6); foot without claws, 12.8 (12); calcar, 

 6(6); forearm, 53 (55); thumb, 10(11); longest finger, 96 (98); ear from 

 meatus, 15.6 (16); ear from crown, 11.6 (12.8); width of ear, 12 (11); 

 tragus, 6 (6.2); height of noseleaf posteriorly, 3 (3); greatest width of 

 noseleaf, 3.4 (4). 



Cranial measurements of type: greatest length, 26 (27); basal length, 

 25 (25.6); basilar length, 22.4 (28.6); xygomatic breadth, 11 (11); interor- 

 bital breadth, 5 (5): mastoid breadth, 10.6 (10.8); breadth of braincase 

 above roots of zygomata, 10 (10); greatest depth of braincase, 8 (8); 

 depth of rostrum between orbits, 3.2 (4); mandible, 17.4 (17.4); upper 

 toothrow (exclusive of incisors), 9 (8.6): lower toothrow (exclusive of 

 incisors), 9.9 (9). 



RctHtii'kx. The most prominent character of this species is the regu 

 lar spacing of the upper incisors. The color is darker than that of the 

 Mexican animal, in which the peculiar bluish cast is quite absent. In 

 L. tiirali* the legs and interfemoral membrane are noticeably sprinkled 

 with hairs 5 mm. in length which produce a distinctly shaggy appear 

 ance. These .hairs are reduced to an inconspicuous pubescense in L. 



^Measurements in parenthesis are those of an adult male Leptonycterts 

 nivnlis from Col i ma, Mexico. 



28 BIOL. Soc. WASH. VOL. XIIT, 1900. 



