142 BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



pointed. Femur with external trochanter triangular, with a horizontal 

 upper border. Eadiocarpal pouch defined; palmar folds present. The 

 endopatagium with numerous vertical muscle fascicles, which form a 

 curved diminishing series toward themanus. The membranes stretched 

 across from the ventral borders of the large, distinct metacarpals. 

 The occipito-pollical muscle receives an accession from the pectoralis 

 nuiscle; it is heUl firmly at the forearm to the fascia over the extensor 

 muscles. The cerebrum is acuminate; cerebellum is with lateral lobe 

 (flocculus). 



Maxillary incisors two, conical, touching canines, i)rotocone small, 

 with trace only of posterior commissure ; third upper molar rudimental ; 

 first upper premolar minute and lies inside axis of dental series. 



Atalapha is the most aberrant of any of the genera of the Vesperti- 

 lionklw, as this family is at present defined. It presents features in com- 

 mon with the Molossi and the Phyllostomickc. The shape of the wing, 

 especially as to the strength of the first metacarpal bone, the shortness 

 of the fifth metacarpal bone as comiiared to others of its series, the 

 rigidity of the phalanges of the fifth digit, the arrangement of the 

 lines in the fourth interdigital space, the flexibility of the lips, the 

 great height of the internal tuberosity and of the length of the epicon- 

 dyle of the humerus, the reverted distal ulnar rudiment, the poste\ior 

 deviation of the coracoid process, the presence of a distinct lateral 

 lobe to the cerebellum, the number of the upper incisors (being re- 

 stricted to two), and the general shape of the wing are as in Molossi; 

 while the complete tympanic bone (forming a ring at the upper margin), 

 the pisiform bone being palmad and articulating with the fifth meta- 

 carpal bone, the palmad distinctness of the metacarpal bones, the 

 shapes and relative i^roportions of the ectoturbinals, the presence 

 of numerous vertical raised muscle-bands on the endopatagium, the 

 angle of the lower jaw not being deflected, but remaining in axial line 

 with that of the horizontal ramus, the genus resemble the true Fhyl- 

 lostomida'. 



The following key will be of use in determining the species : 



I. Border of ear liglit brown; no clumi),s of liair on forearm. 



a. External basal lobe of ear notched A. noveboracensis [p. 142] . 



b. External basal lobe of ear not notched A. teliotis [p. 153] . 



II. Border of ear black; a clump of hah- on dorsum of forearm . ..J. cmerea [p. 1.55]. 



Atalapha noveboracensis (Erxleben). The Red Bat. (Plates xxvi, xxvii, xxviii.) 



Vespertilio noveioracensis Erxl., 8yst. Reg. Auim., 1777, 135; Harlan, Fauna Amer., 

 1825, 20; Godman, Amer. Nat. Hist., i, 1826, 50; Cooper, Ann. Lye. Nat. Hist. 

 N. Y., 1837,57; De Kay, Nat. Hist. N. Y. (Zool.), 1842, 6, pi. ii; Leconte, Proc. 

 Acad. Nat. Sci. Phila., 1855, 432. 



Nyctieejus noveboracensis Leconte, Cuv. Regn. Anim. (McMurtrie's ed.), Appendix, 1831 , 

 432; Temminck, Monog. Mam., ii, 1835, 158. Wagner, Schreb. Siiugeth., Siippl.,i, 

 1840, 546; Ih., v, 1855, 773. Schinz, Synopsis Mam., i, 1844, 199; Max. zu. Wied, 

 Archiv Naturgesch., 1861, 186. 



