1891.] [Allen. 



On a New Species of Atalapha. 



By Harrison Allen, M. D* 

 (Read before the American Philosophical Society, January 16, 1891.) 



ATALAPHA TELIOTIS, sp. nov. 



Ears rounded much smaller than head. The internal basal lobe longer 

 than broad, and without posterior projection. The external basal lobe 

 longer than high, without notch at the base anteriorly. The hem occupy- 

 ing notch is half the height of the auricle and is ample. The tragus is 

 coarsely crenulate on the outer border, slightly narrowed at the tip, which 

 is not turned forward. The external surface is without a trace of ridge, 

 and the notch at the base above the small basal lobe without a tubercle. 

 Snout and lower lip quite as in other species of the genus, except that the 

 chin-plate is somewhat wider. 



Skull with groove on centre of face-vertex continuous with the anterior 

 nasal aperture. Sagittal temporal ridge sinuate. The first upper premo- 

 lar exceedingly minute, scarcely half the size of the corresponding tooth 

 in other species ; it can with difficulty be seen even with the aid of a 

 lens. The lower premolars are nearer of a size than is the case in other 

 species, the first being fully half the size of the second. The third lower 

 incisor is rounded, minute, and without cuspules. 



The membranes are much as in A. noveboracensis, but the terminal 

 phalanx of the fifth finger is longer, and ends with a free end on the mar- 

 gin of the endopatagium. The membranes are attached to the foot at a 

 point midway between ankle and the base of the toes. 



The prevalent color of the hair is dark chestnut above, but lighter 

 below. The base on the body is everywhere black, and the shafts buff. 

 No ashy tips are anywhere seen. The ventral half of the side of neck is 

 white. The hair is scanty along the ventral surface of the forearm and 

 the proximal ends of the last three metacarpals. The dorsutn of the inter- 

 femoral membrane is furred only at the basal third. The remaining 

 characters as in A. noveboracensis. 



This species is readily distinguished by the shape and small size of the 

 ear and tragus, by the attachment of the wing-membrane to the foot, and 

 by the peculiarities of the premolars in both jaws, as well as those of the 

 third lower incisors. It agrees with a southern variety of A. noveboracensis 

 (A.frankii) in the partially free dorsal surface of the interfemoral mem- 

 brane. 



The specimen was forwarded to me by Mr. J. G. Coopsr, of the Cali- 

 fornia Academy of Natural-; Science, in a bottle containing an example of 

 A. noveboracensis, and it resembles this form so closely in coloration that 

 at first I mistook it for an immature example of the species last named. 



