250 PROCEEDINGS OF THE ACADEMY OF [March, 



A STUDY OF THE BATS OF THE GENUS DERMONOTUS (PTERONOTUS Auot.). 

 BY JAMES A. G. REHN. 



During the preparation of tliis paper a series of thirty-six specimens 

 of the genus have been examined, all being from the collections of the 

 United States National Museum, the Biological Survey of the United 

 States Department of Agriculture and the American Museum of Nat- 

 ural History. The author wishes to express his indebtedness to the 

 gentlemen in charge of the collections of the above institutions for 

 permitting the examination of the specimens. 



DERMONOTUS Gill. 



1S38. Pteronotus Gray, Mag. Zool. and Botan}^, II, p. 500. Type, Pteronotus 



davyi Gray. (Not of Rafinesque, 1815.) 

 1S43. CMlomjcteris Wagner, Archiv fiir Natvirgeschichte, IX, bd. I, p. 367. 



(Part.) 

 1844. Pteronotus Gray, Voyage of the Sulphur, I, MammaUa, p. 24. 

 1850. Chilonycteris Wagner, Abhandlungen Mathem.-Physik CI. Akad. 



Wissenschaften, Miinchen. V, p. 179. (Part.) 



1854. Chilonycteris Burmeister, Thiere Brasiliens, I, p. 74. (Part.) 



1855. Chilonycteris Wagner, Suppl. Schreber's Saugthiere, V, p. 677. (Part.) 

 1855. Pteronotus Wagner, Suppl. Schreber's Saugthiere, V, p. 700. 



1872. Pteronotus Peters, Monatsber. K. Preuss. Akad. Wissensch., Berlin, 

 • p. 361. 



1878. Chilonycteris Dobson, Catal. Chiropt. Brit. Mus.. p. 447. (Part.) 



1879. Chilonycteris Alston, Biol. Cent.-Amer., Mamm., p. 34. (Part.) 

 1890. Pteronotus J. A. Allen, Bull. Amer. Mus. Nat. Hist., Ill, p. 178. 

 1892. Chilonycteris Thomas, Ann. and Mag. Nat. Hist., 6th ser., X, p. 410. 



(Not of Gray.) 

 1894. Pteronotus J. A. Allen, Bull. Amer. Mus. Nat. Hist., VI, p. 248. 



1901. Dermonotus Gill, Proc. Biol. Soc. Washington, XIV, p. 177. (To 

 replace Pteronotus Gray.) 



1902. Dermonotus Miller, Proc. Biol. Soc. Washington, XV, p. 155. 



Gena'ic Characters. — Naked volar membranes extending over the back 

 attached only along the median line and across the shoulders, anterior 

 to which section the dorsal surface is normally furred. Skull with the 

 brain-case moderately elevated and rostrum distinctly inflated. Den- 



i-x- • 2—2 1—1 2—2 3—3 



tition 1. 2=72. c. j-^, p. 3-3, m. 3-3. 



History. — The genus Dermonotus (Pteronotus Gray) is so closely 

 related to Chilonycteris and Mormoops that its history is in great part 

 a repetition of that witnessed in these two genera. As considerable 



