1SS9.] obi [Allen. 



Jleasurements of Body. 

 mm. 



Length of head and body 58 



" " tail in membrane 17 



" " free 19 



" " forearm 40 



" " first finger, including 



metacarpal 8 



" " second metacarpal 39 mm. mm. 



"third " ....40; 1st ph., 19 ; 2d ph., 15 



" fourth " .... 40; " 15; " 3 



" fifth " .... 23; " 13; " 3 



" tibia 11 



"foot 7 



The description is based upon examination of twenty adult specimens, 

 all females. 



Habitat, Brazil. Collected by Prof. Harte. Prof. B. G. Wilder has 

 kindly permitted me to study the Cheiroptera in the museum of Cornell 

 University. The species above named was secured from this collection, 

 where the type specimens remain. 



JSf. europs resembles iV. 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 56 

 mm. (2.35"). yet the length of the second phalanx of the fourth finger is 

 less than 1 mm. (0".l). This phalanx in N. europs measures 3 mm. 



Nyctinosius orthotis, n. s. 



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 iV". 

 Irasiliensis 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 concavity in front of the 

 ears. The upper border of the muzzle is not projecting, and without 

 pectinate spines, but furnished with papilhie, which extend over the nos- 

 trils. The ears are erect, large, extending 4 mm. in advance of the 

 muzzle, and afe 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 tiie 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 



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



PIIOC. AMER. PHILOS. SOC. XXVI. 130. 3s. PRINTED DEC. 18, 1889. 



