238 Bulletin American Museum of Natural History. [Vol. V, 



6. Hemiderma 1 brevicaudum (Wied). Five specimens, 

 two males and three females, San Sebastian, San Jose, August, 

 1891. 



*7. Artibeus cinereus (Gerv.). Two adult females and an 

 additional adult skull, San Sebastian, San Jose, August, 1891. 



8. Artibeus carpolegus Gosse. One adult male and five 

 Specimens more or less immature, as shown by the skulls. The 

 adult male was taken at San Jose, June 21, 1891, the immature 

 examples at Limon, May 27, 1891, all collected by Mr. Cherrie. 



The single adult male has faint whitish head-stripes ; in the 

 immature examples there is no trace of head-stripes ; and the 

 coloration of the pelage everywhere is darker slaty black instead 

 of browish black and the measurements are all much smaller. 

 As regards external characters, the young might be readily 

 mistaken for a distinct species ; the skulls, however, show them 

 to be simply immature examples of A. carpolegus. 



*Q. Vampyrops lineatus Geoffr. One specimen, adult 

 female, Jimenez, Sept. 9, 1891, A. Alfaro. 



*IO. Blarina micrura (Tomes). One specimen, San Isidro, 

 San Jose, Sept. 25, 1891, Geo. K. Cherrie. 



11. Sigmodon hispidus toltecus (De Sauss.). One speci- 

 men, adult male, San Jose, November, 1890, Geo. K. Cherrie. 



12. Abrothrix teguina (Alston]. Two males and a female, 

 La Carpintero, Sept. 2, 1891, Geo. K. Cherrie. 



13. Sitomys cherriei Allen. 



Hesperomys ( Vesperimus) cherrii ALLEN, Bull. Am. Mus. Nat. Hist. Ill, p. 

 211, April 17, 1891. 



This species is represented by a series of 15 specimens, includ- 

 ing immature examples as well as adult. There is little, however, 

 to add to the description of the species already given (1. c.). 

 They are all from La Carpintero, the original locality, taken July 

 15-26, 1891, by Mr. Cherrie. 



1 Hemiderma Gervais, i855=CaroH2a Gray, 1838, preoccupied. 



