108 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



since been erroneously recorded^' from Panama, but an examination 

 of the specimens on which this record was based shows that they 

 belong to the form aztecum.^ and the type, which is from Costa Rica, 

 remains unique. 



snhrufum. {Ilemiderma) Hahn, Proc, Biol. Soc. Wash., XVIII, 1905, 

 p. 247. This name was proposed for the smaller species known from 

 Mexico. As mentioned in the original description, it does not appear 

 to intergrade with any other known form and must be regarded as a 

 distinct species. 



MATERIAL. 



In the preparation of this paper 371 specimens have been examined, 

 most of which are in the collections of' the U. S. National Museum. 

 My thanks are due to Dr. C. Hart Merriam, Chief of the Biological 

 Suryey, U. S. Department of Agriculture; to Dr. J. A. Allen, Curator 

 of Birds and Mammals in the American Museum of Natural History; 

 to Mr. Samuel Henshaw, Curator of the Museum of Comparative 

 Zoology, Cambridge, Massachusetts, and to ]\Ir. .1. A. G. Rehn, of 

 the Academy of Natural Sciences, of Philadelphia, for the loan of 

 specimens. 



Genus HEMIDERM A. 



Size medium, but heavily built; tail short, entirely enclosed in the 

 interfemoral membrane excepting the tip which forms a little knob 

 on the upper surface; free border of interfemoral membrane deepl}' 

 notched; ears moderate; nose-leaf thick and broad; chin with a large 

 wart in the center and a V-shaped double row of smaller warts on the 

 sides. 



Skull heavily built; zygomatic arches incomplete; palate prolonged 



backward in center beyond the line of the teeth, forming a sort of a 



2-2 1-1 2-2 3-3 

 tubular projection. Dental formula i. ^^k, c. riT, p- aZo' ^^- qZq~^^- 



Middle upper incisors inclined toward each other at the tips, outer 

 ones minute; middle lower incisors notched. Molars with a single 

 internal cusp. 



HEMIDERMA PERSPICILLATUM (Linnaeus). 



Vespertilio perspicillatus Linnaeus, Syst. Nat., 10th ed., 1758, p. 31 (based on T>s- 

 pertilio atnericanus vulgaris Seba, Locupl. rer. nat. Thes., 1734, p. 90). 



Phyllostoma bernicauduin WiEn, Schinz' Thierreich, I, 1821, p. 164. 



Phyllosloma brachyotos VVied, Schinz' Thierreich, I, 1821, p. 164. 



Vampyrus soricinus Spix, Simiar. et Vespert. Brasil., 1823, p. 66, pi. xxxvi, tigs. 

 2 and 6. 



Phyllostoma brevicaudum Wied, Beitr. z. Naturgesch. Brasil., II, 1825, p. 192. — 

 Wagner, Suppl. Schreb. Siiugeth., I, 1844, p. 401; Y, 1855, p. 626.— Burmeister, 

 Thiere Brasil., 1854, p. 41. 



"Bangs, Bull. Mus. Comp. Zool., XL VI, p. 213, Jan., 1906. 



