A MONOGKAPH OF THE BATS OF NORTH AMERICA. 155 



MiaHurcvientH — Coutiuucd. 



Millimeters. 



Height of tragus 3 



Length of thigh 14 



Length of h'g 16 



Length of foot 6 



Length of tail 39 



Width of second iuterdigital interspace 2 



Width of third interdigital interspace 10 



Width of fourth interdigital interspace 28 



Difference between third and fourth inters]iace 18 



Length of forearm 37 



The measurement of the body and of tlie metacarpals are witliin the 

 range of these which can be made on specimens of A. novehoracensis. 

 The second phahinx of the third linger is longer than the second; the 

 second phalanx of the fourth finger is much shorter than the first; the 

 second phalanx of the fifth finger is of the same length as the first. In 

 these respects the measurements are in contrast witli those of A. nove- 

 horacensis. The thigh is shorter than the leg, while both are smaller 

 than is the species named. The foot is shorter, while the tail is slightly 

 longer. 



3. Atalapha cinerea (Palisot do Beanvois). The Hoary Bat. (Plates xxix, xxx, 



XXXI.) 



Vespertilio chierciis Palisot de Eeauvois, Cat. Peale's Mus., Phila., 1796, 14; Le- 



coutc, Proc. Acad. Nat. Sci. Phila., 1855, 433. 

 TesperiUio lyrulnosus Say, Long's Exped. to Rocky. Mts., 1823, 67; Harlan, Fauna 



Amer., 1825, 21; Ih., Med. and Phys. Researches, 1831, 28; Godman, Anier. Nat. 



Hist., 1826, 68, pi. ii, f. 3; Richardson, Fauna Boreal. Anier., 1829, 1; Cooper, 



Ann. Lye. Nat. Hist. N. Y., iv, 1837, 54; DeKay, Nat. Hist. N. Y. (Zool.), 1842, 



7, pi. 11, f. 2. 

 Scotophllus pniiuosm Gray, Mag. Zool. and Bot., ir, 1838, 498. 

 NycticcJHs pruinosiis Temuunck, Monog. Mam., 18.35, 154; Wagner's Schreb. Siiug. 



(Suppl.), I, 1840, 544; Ih. v, 1855, 770; Schinz, Syn. Mam., i, 1845, 197; Mas. 



Zu, Wied, Archiv Naturgesch., 1861, 185. 

 Lasiurus pruinosus Tomes, Proc. Zool. Soc. Lond., 1857, 37. 

 Lasiurus Hiierens H. Allen, Monog. N. A. Bats, 1864,21; J. A. Allen, Mammals of 



Mass., 1869, 208. 

 Atalaitha ciiicrea Peters, MB. Akad. Berlin, 1870, 910 — Dohson, Cat. Chirop. Brit. 



Mus., 1878, 272— Alston, Biol. Ceutrali-Anier., 1879-'82, 23. 



Diagnosis. — A large bat with rounded black-bordered ears, blunt in- 

 curved tragus; external basal lobe without notch ; interfemoral mem- 

 brane hairy above. Color distinctive, being hairy with play of colors 

 of grays and of dull yellow. A clump of hair above the dorsal aspect 

 of elbow. Forearm 54'"™' 



The second phalanx in each digit shorter than the first. 



The manal formula is as follows: 



etcrs. 



Third interspace , 131 



Fourth interspace 40 



Forearm 49 



Differences between third and fourth 27 



