128 



BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



MtasuremenU from first edition of Monofjrapli. 



Length 

 of tail. 



Length 

 of fore- 

 arm. 



1.6 

 1.6 

 1.5 

 1.6 

 1.6 



In. 

 1.4 

 1.4 

 L4 

 L4 

 1.4 

 1.4 

 1.3 

 1.4 

 1.3 

 1.3 



Length 

 oftibia. 



In. 



0.7 

 0.7 

 0.6 

 0.6 

 O.G 

 0.7 



Length 



oi" 

 longest 

 finger. 



In. 



Length 



of 

 thumb. 



hi. 

 0.4 

 0.4 

 0.4 

 0.4 

 0.4 

 0.4 

 0.4 

 0.3 

 0. 3?, 

 0.4i 



Height 

 of e;ii-. 



Height 



of 

 tragus. 



In. 

 0. .5 

 0.5 

 0.7 

 0.6 

 0. .5 

 0.5 



0.4J; 



0.5' 

 0.5 

 0.5 



Ex- 

 panse. 



In. 

 9.0 

 8.9 

 8.6 

 8.G 

 8.6 

 9.0 

 9.3 

 9.3 

 8.11 

 8.10 



Nature of 

 sjiecimen. 



alcoholic. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 



List of specimens. 



Cata- 

 logue 

 number. 



5297 



5433 

 5375 

 5298 

 5440 

 5340 

 5339 

 5341 

 5442 

 5343 

 5401 

 5318 

 5360 

 5371 

 5439 



No. of 

 speci- 



36 



Locality. 



Carlisle, Pa. 



do 



Washington 



do 



Hampshire Co., Va. 



Clark Co., Va 



Mount Vernon 



Whitfield Co., Ga.. 



Georgia .'. .. 



New Orleans 



St. Louis, Mo 



Cairo, 111 



Poteau Creek, Ark. 

 Mataraoras, Mex. . . 

 United States 



Presented by — 



S.F. Baird... 



do 



(?) 



C. Girard 



M. M'Donald 



Dr. Keunerly 



(-0 



A. Gerhardt 



W. Cooper 



N.O.Acad 



Dr. (i. Engelmann 



R.Kennicott 



Dr. G C. Shumard 



Lt. Cimch (Berl. Col.). 

 Major Leconte 



Nature of 

 specimens. 



In alcohol. 



Dry .skin. . 

 In 'alcohol. 



..-do 



Dry skin. . 

 In alcohol. 



...do 



...do 



Dry skin.. 

 In alcohol. 



...do 



...do 



...do 



Collection. 



.do. 

 .do. 



V. S. Na- 

 t i o n a 1 

 Museum. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



2. Vesperugo hesperus H. Allen. The Tvestern bat. (Plates xx, xxi.) 

 ScotopMlus hesperus H. Allen, Monog. N. A. Bats, 1864, 43. 

 Vespeneijo liesperus True, Proc. U. S.Nat. Mns., 1887, 515. 

 Vespenif/o merriami Dobson, Ann. & Mag. Nat. Hist., (v), xviii, 1886, 124. 



Diafjnosis. — Smallest bat in the fauna ; forearm 26"'"\ Tragus not half 

 the height of the auricle ; inner border concave ; outer convex tip blunt. 

 Lower scallop slightly revolute ; external basal lobe not revoluteoblique ; 

 base scarcely wider than the narrow blunt tip; interfemoral membrane 

 ample with post calcaral lobe; tail extended one half its length beyond 

 the ankle. The metacarj)al of the third digit as long as the forearm; 

 the first phalanx of the same shorter than the second. The second 

 digit not longer than the tliird metacarpal bone. Foot larger than the 

 thumb, equals over one-fifth of the length of the forearm. Penis cylin- 

 droid. In the third maxillary molar a trace of the last limb of the sec- 

 ond V is discernable. Transverse line on the interfemoral membrane 

 interrupted at the pubotibial line. 



The manal formula is expressed as follows : 



• Millimeters. 



First interspace • 1 



Second interspace 6 



Tliird interspace 22 



Forearm 26 



