A MONOGRAni OF THE BATS OF NORTir AMERICA 125 



linos for nearly its entire extent. Specimen jSTo. 5!)85 S. 1., Carlisle, 

 Pa., retains scarcely any basal or apical brown <»n tliedorsnm, tlieliair 

 is of an obscure pallid hue, while beneath a rich chestnut color pre- 

 dominates. 



A young specimen which measured 30""" from crovrn of head to the 

 pubis j)0ssessed short unicolored hair throughout. On the dorsum the 

 hair was light rufus brown. Ou the venter the color was more obscure. 

 The left side of the neck and body was old gold, while the right side 

 was the color of the rest of the venter. The hair on the front of the 

 neck was not smooth, but preseuted the appearance of a ruffle or irregu- 

 lar roussette. On the membranes the hair distribution was the same 

 as in the adult, excepting that the dorsum of the interfemoral membrane 

 was furred to a line above the ankles. 



Variations. — The ear may be slightly longer than the head. Varia- 

 tions in the arrangement of the nerves of the fourth digital interspace 

 are noted in the diagnosis. 



The membranes. — V. caroUnensis is remarkable for the absence of pig- 

 ment from the second digital interspace. The wing membrane is at- 

 tached to the foot at the base of the toes. The tip of the tail is exsert 

 from an ample interfemoral membrane, whose free border is slightly 

 convex. The calcar ends Avithout marginal tip ; there is no post cal- 

 caral lobe. The bodies of the caudal vertebrjie are all dorsal; the 

 upper part of the interfemoral membrane is not furnished with trans- 

 verse muscle fibers. 



Intercostals are three in number. Coraco-brachialis fascicle from the 

 axilla. The fourth interspace with two long conspicuous predigitals, 

 but, as a rule, no postdigital. The third interspace with the nerves 

 from the metacarpo phalangeal Joints. In a few specimens the two 

 dostdigitals arise from a common line which extends parallel to the 

 fifth metacarpal bone, in which case a close resemblance to some forms 

 of Adelonycteris fuscns is seen. The terminal jdialanx of the fourth 

 finger as in L. noctivagans. 



The interfemoral membrane is marked by a number of delicate trans- 

 verse, slightly pilose lines, which can be traced upward as far as the 

 second caudal vertebra. The pilose spots are conspicuous on tliese 

 lines, as well as on those of the endopatagium near the body. The 

 terminal cartilage of the fourth digit is directed pollical. 



Maxillary teeth.* — The central incisor bifid (rarely monocuspid); a 

 thin lamina terminates the tooth posteriorly. The lateral is smaller, 

 with a thin transverse lamina on either side of the single cus}). An in- 

 terval between the lateral and the canine. The canine as in A.fuseus, 

 i.e., the posterior surface deflected outward beyond the axis of the den 



*Miij. Leconte (?. c.) notes tlio following': 'ToHterior false molar of the upper 

 jaw h;ia an interior basil, biomarginate cusp foniied from a prolongation of tlie eal- 

 cauenm of the tooth, and the canine of the lower Jaw has an interior, blunt, basal 

 lobe." I have not reqognized the peculiarities here noted. 



