638 DESCRIPTION OF NEW SPECIES OF BATS ALLEN. 



The description is based upon examination of twenty adult speci- 

 mens, all females. 



N. europs resembles N. megalotis* in the shape of ears and color of 

 fur. It differs in the shape of the antitragus. N. megalotis is a larger 

 form, the length of the body and head being 75 mm (3"), and that of the 

 forearm 5G mm (2.35"), yet the length of the second phalanx of the 

 fourth finger is less than l mm (0".l). This phalanx in N. europs meas- 

 ures 3 mm . 



Habitat. — Brazil. Collected by Professor Harte. 



Prof. B. G. Wilder has kindly permitted me to study the Cheiroptera 

 in the museum of Cornell University. The species above named were 

 secured from this collection, where the type specimens remain. 



Nyctinomus orthotis sp. nov. 



The upper margin of the muzzle is below the plane of the dorsum of 

 the face. The vertical ridge between the nostrils seen in N. europs and 

 N. brasiliensis is absent. The nostrils are elliptical, slightly expanded 

 above and look directly forward. The entire region of the muzzle 

 abruptly cut off, and of quite peculiar physiognomy. There is no con- 

 cavity in front of the ears. The upper border of the muzzle is not pro- 

 jecting and without pectinate spines, but furnished with papillae, which 

 tend over the nostrils. The ears are erect, large, extending 4 mm in 

 advance of the muzzle, and are united on the dorsum of the face by a 

 band 3 mm high. 



The general form of each ear is rounded and stands out from the 

 head as in N. brasiliensis. No spines occur on the upper border. The 

 outer border is furnished with a lap or hem of skin, which measures 

 one-fifth of the diameter of the ear couch. It is slightly scalloped in the 

 middle and extends as far forward as the end of the external basal 

 ridge. The keel does not reach the antitragus ; it is thickened and not 

 revolute. The anterior basal ridge forms a distinct projection at the 

 notch. The notch exteuds to the base of the antitragus. The antitragus 

 is thin, broader than high, and slightly higher posteriorly than ante- 

 riorly. A skin fold extends from the antitragus to the angle of the 

 mouth. The tragus is quadrate and bears a general resemblance to 

 that in N~. brasiliensis. The sides of the face are without folds. 



The fur on the dorsum is fawn color with paler tints at the base. It 

 extends halfway up the ears. On the dorsum the proximal half of the 

 arm, the entopatagium near the body, and the basal fourth of the tail 

 are covered with hair. On the venter the color is the same as on the 

 back, except on the face and ears, where it is of a dark chestnut. The 

 venter, the arm, the thigh, and entopatagium halfway to the elbow are 

 covered with a thin layer of fur. The face is occupied by a number of 

 stout bristles between the ears and the muzzle. Two hairs, l mm long, 

 project from the mental wart. 



* Dobson, Cat. Cheiropt., Br. Mus., 1878, p. 434. 



