Vol. XIX, pp. 59-60 May 1, 1906 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW GENUS OF SAC- WINGED BATS. 

 BY GERRIT S. MILLER, JH. 



While examining the bats in the Royal ^luseuni of Natural 

 History at Berlin, kindly placed at my disposal l)y Prof. Karl 

 JNIobius and Prof. Paul Matschie, I found four specimens from 

 Surinam collected by Kappler and labeled by Peters as Cormura 

 brevirostris. On comparing them with the original description 

 and figure of this genus,* however, striking discrepancies were 

 at once, apparent. Another specimen of the same animal, from 

 Baranciva, Brazil, was sent me by Dr. Lorenz von Liburnau of 

 Vienna, with the information that the type of Cormura, originally 

 in the Natural History ^Museum, can not now be found. The 

 genus Cormura therefore rests wholly on the plate and descrip- 

 tion ; and as these do not agree with the specimens it is neces- 

 sary to name the animal represented in the museum of Vienna 

 and Berlin. 



Myropteryx gen. nov. {Emlxi Uonuridne) . 



Type. — Myropteryx pullus sp. nov. 



Characters. — Externally most nearly resembling Peropteri/x, witli which 

 it agrees in i)osition of wing sacs, but with broader head and more widely 

 separated ears. Skull essentially like that oi ISiiccnpleryx but with shorter, 

 relatively deeper rostrum. Teeth differing from those of all the previously 

 known sac-winged genera in the absence of hypocone in first and second 

 upper molar, and in the minute, early deciduous upper incisor. 



Retnarks. — This genus is well characterized by the complete absence of 

 hypocones in the_ upper molars, and by the great reduction of the upper 

 incisors. In the four adults examined the upper incisors are absent. In 

 an immature individual, however, there are two very minute teeth in each 

 premaxillary. Wiietlier this condition is normal can only be conjectured, 

 but neither tooth has the appearance of a remnant of the milk dentition, 

 no trace of which can be found elsewhere. In the description of Cormura 

 the upper incisors are merely said to be extremely small, while the figure 



* Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 1867, p. 475, pi. p. 480. 

 13— Pkoc. Biol. Soc. Wash., Vol-. XIX, 190G. (.'i9) 



