DESCRIPTION OF TWO NEW SPECIES OF BATS— NYCTINOMUS 

 EUROPS AND N. ORTHOTIS.* 



BY 



Harrison Allen. 



The genus Nyctinomus includes twenty-one species and is of cosmo- 

 politan distribution. Thus ten species are found in Africa and Mada- 

 gascar ; one in Europe, with a range in the northern part of Africa j 

 two in India ; two in the Malay Archipelago, one each in Polynesia and 

 Australia, and four in America. It is interesting to contrast this wide 

 range with that of the other two genera of the group in which Nycti- 

 nomus is found, namely, Gheiromeles, which is restricted to the Indo- 

 Malayan subregion, and Molossus, which is confined co tropical and 

 subtropical America, excluding the United States. Notwithstanding 

 the extended range of Nyctinomus, the species are closely related. 

 With the exception of N. johonensis and N. australis, few specialized 

 structures are met with ; and but two species — oue from Madagascar 

 (N. albiventer) and a second from Africa (N. acetabulosus) — depart from 

 a single formula for the teeth. As is the case with the Cheiroptera 

 generally, the American species are the most obscure. Of the four 

 described species 1 have seen N. brasiliensis, N. macrotis and N. gracilis. 

 A recent study of the materials at hand has led me to record descrip- 

 tions of two new species. 



Nyctinomus europs sp. nov. 



Muzzle divided in middle into two parts by a vertical linear groove, 

 the sides of which are defined by spines. These are continuous with 

 the spines of the upper border of the muzzle. Ears united over the 

 face for a distance of 2 mm . The outer border of the auricle not scal- 

 loped on the line of the external basal ridge, but is uniformly rounded. 

 The revolute margin reaches as far as the anterior border of this ridge. 

 The inner border of the auricle retains six small marginal spines. The 

 tragus is small-pointed or obscurely notched on the summit, and is but 

 one-half millimeter high. The antitragus, as wide as high, much nar- 

 rower above than at base; the notch posterior to it is well-defined and 

 reaches half way to the base. The external basal ridge is rudimental. 



* Read before the American Philosophical Society, October 4, 1889, and printed in 

 Proc. Araer. Phil. Soc, Vol. xxvi, December 3, 1889. It is here reprinted as a paper 

 based upon a study of the collections of the National Museum. 



Proceedings National Museum, Vol. XII— No. 786. 



635 



