9O Bulletin American 'Museum of Natural History. [Vol. XIII 



are clearly indicated. Apparently they are absent, as a rule, 

 only in old specimens. 



As noted above, all of the specimens except three were taken 

 from caves at Taguaga, on the seashore. As this series contained 

 no specimens of G. soricina, apparently the two species are not 

 intimately associated in life, though examples of both were taken 

 at Bonda, near Taguaga. 



9. Hemiderma brevicauda (Wted). Fourteen specimens, 

 Bonda, April 27 and June 14. 



10. Phyllostoma hastatum (Pallas). One specimen, in 

 alcohol, from Bonda, May, 1898. This is a very large and very 

 old individual, the teeth being greatly worn. 



11. TrachopS cirrhosus (Spix). One specimen, Bonda, 

 June 12. 



12. Micronycteris megalotis (Gray). Thirteen speci- 

 mens, Bonda, May 26, June 13-20, August 8, and November 20. 



13. Micronycteris hypoleuca, sp. nov. 



Type, No. 15131, $ ad. (skin without skull), Bonda, July 9, 1899 ; coll. H. 

 H. Smith. 



About the size of M. minuta, but white below instead of ashy, and the basal 

 portion of the pelage above white instead of ashy white. 



General color above dark reddish brown, the basal half of the pelage white 

 with a faint tinge of yellowish ; below white to the base of the pelage, with a 

 faint yellowish tinge, the hairs posteriorly on the sides faintly ashy brown sub- 

 terminally ; colors of dorsal and ventral surfaces sharply defined. Ears brown, 

 furred about as in M. megalotis ; proximal fourth of forearm above covered 

 with short fur. Forearm long in proportion to the rest of the wing, the 

 forearm about equalling the length of the forearm in M. megalotis, while the 

 third finger is much shorter tha'n in that species. Foot long and narrow, 

 much longer than in M. megalotis, although the latter is a much larger species. 



Measurements. " Total length to end of tail, 60" ! ; ear, 14 ; nose leaf, 3.5 

 x 5.5 ; forearm, 33 ; thumb, 8 ; third finger metacarpal, 27, 1st phalanx, u, 

 2d phalanx, 12, 3d phalanx, 9 ; fourth finger metacarpal, 28, 1st phalanx, Q, 

 2d phalanx, 9 ; fifth finger metacarpal, 28.5, 1st phalanx, 10, 2d phalanx, 8 ; 

 tibia, 20 ; foot, n ; calcaneum, 8. 



This species resembles Schizostoma minuta Gervais (Exped. du 

 Compte de Castelnau, Zool., I, 1855, Mamm., p. 50, pi. vii, fig. 



1 Collector's measurement from the fresh specimen ; rest of measurements from the dry skin. 



