A MONOGRAPH OF THE BATS OF NORTH AMERICA. 59 



trencliaiit and well seen from above. Anterior V slightly smaller than 

 posterior ; hypocone absent. The third molar with protocone with entire 

 commissure; anterior V complete; posterior V lacking the greater part 

 of the posterior limb. 



Mandibular teeth. — The incisors trifid, scarcely crowded; basal ridge 

 developed into a high cingulum, giving the teeth a multituberculate 

 appearance. The canine with a well-develoi)ed cingulum at the lingual 

 aspect; both anteriorly and posteriorly it is furnished with a tubercle. 

 The first and second premolars are small, conical, with comj)lete cingula. 

 The first tooth is slightly the smaller. The cusps of the molars are all 

 high and sharp. The heel is well developed in all the molars, and in the 

 third is triangular. The commissure on base in all the molars is unusu- 

 ally high. The paraconid subequal through molars, inclined forward, 

 the conjoined bases of this cusp and that ofthe met aconid incised some- 

 what as in Macrotus. 



N'otes on the sTceleton — Scapula. — The coracoid is simple, neither 

 curved backward nor forward; axillary border nearly straight, scarcely 

 convex. Hiimerns. — The epitrochlea as in VespertUio; the lateral 

 groove on the trochlea is sharply defined; olecranon fossa present. 

 Ulna. — Proximal rudiment anchylosed to radius; shaft not traceable. 

 Distal rudiment quadrate plate as in VeHpertilio. The pisiform bone 

 lies across the palmar aspect of the carpus and does not act as a splint 

 ta the fifth metacarpal bone. 



Habitat. — Western and central portions of the United States, extend- 

 ing south to Mexico.* Specimens in the National Museum are from 

 Utah and the upper part of Missouri. 



Meaxiifcmenln. 



(N... 1-J20.1 



Millimeters.. 



Head aucl body (from crown of head to base of tail) 38 



Leugth of arm 21 



Length of forearm 42 



First digit : 



Length of first metacarpal bone 2^ 



Length of first phalanx 3^^ 



Second digi^ : 



Length of second metacarpal bone 34 



Length of first phalanx 2 



Third digit : 



Length of third metacarpal bone 35 



Length of first phalanx 13 



Length of second x>halanx '. . . . 16 



Fourth <ligit : 



Length of fourth metacarpal l)onc 



Length of first iihalanx 10 



Length of second phalanx 12 



'J. A. Allen reports it from Guadalajara, Mexico. 



