﻿94 



NORTH AMERICAN FAUNA. 



Hairs of back clove-browii for basal half, followed l)y two eciual zones respectively 

 broccoli-brown and clove-brown; some of liairs furthermore ti])ped with light Van- 

 dyke-brown, giving a decidedly ''rusty" tone to the back. Ventral surface; bases 

 of hair slightly lighter than those of back, followed by light-hair brown, producing 

 a grayish or smoky effect. • 



Wing membranes naked; except a very limited area on upper surface along sides 

 of body, not exceeding 3 or 4 mm. in width ; and on lower surface, the area included 

 between a line passing from the middle of humerus to the knee and the side of the 

 body is scantilj^ haired. 



Interfemoral membrane with a small, triangular patch of hair on its upper sur- 

 face, covering base of tail, and extending to one-fourth of its length. 



Legs and anus naked. Wing extending from base of outer toe. Antebrachial 

 membrane losing itself at middle of radius. Two caudal vertebrte free from 

 membrane. 



Black glandular prominences between eyes and nostrils well developed, fringed 

 with longish hairs on both upper and lower edges, and with three or four long, 

 black, bristly hairs growing from its upper surface. 



Inner edge of ear conch evenly convex. Outer edge coming up in an even, sweep- 

 ing curve from angle of mouth to level of tip of tragus, where it meets a slightly 

 concave line leading up to the obtusely rounded tip. A nearly semi-circular anti- 

 tragns is developed from that part of the conch passing below the tragus. Bone of 

 inner margin of tragus concave, thus throwing this organ forward, followed by a 

 straight margin. Bone of outer margin with a subtriangular lobe, followed by a 

 deep notch, above which the greatest width is quickly reached. From here a nearly 

 straight line leads to the tip, which is obtusely rounded. 



Measurements in millimeters : Length of head and body, from tiji of nose to base 

 of tail, 37.5; length of tail, 36; length of tail beyond membrane, 3; length of head, 

 15; height of ear, from notch between antitragus and conch to tip, 10; height of 

 tragus, inner margin, 1.5; height of tragus, outer margin, 6; greatest width of 

 tragus, 2; length of antitragus, 2; height of antitragus (approximately), .75; length 

 of forearm, 31; length of thumb, including claw and excluding metacarpus, 7.5. 

 Second digit — metacarpal, 29. Third digit — metacarpal, 30.5; first phalanx, 11.5; 

 second phalanx, 11; cartilaginous tip, 5. Fourth digit — metacarpal, 29; first i^ha- 

 lanx, 10; second phalanx, 7; cartilaginous tip, 2.5. Fifth digit — metacarpal, 28; 

 first phalanx, 8.5; second phalanx, 5; cartilaginous tip, 1. Interspace between 

 tips of third and fourth digits, 16 ; interspace between tips of fourth and fifth digits, 

 37; interspace between tip of fifth digit and juncture of membrane with foot, 42; 

 extent of outstretched wings, 212; length of tibia, 13.5; length of foot, 9; length 

 of calcaneum, about 8. 



9-9 1-1 9_9 



Middle upx)er incisors separated by 1.5 mm., inclined forwards and iu wards ; a 

 large internal cusp on posterior-external edge halfway uj) from base to tip. Outer 

 incisors simple, conical, inclined i^arallel to their respective inner mates, separated 

 from canines by about .75 mm. Lower incisors tri-lobate, evenly spaced. Upper 

 canines long, simple, slightly recurved. Lower canines straight, with basal cusps 

 on forward edge only. First upper premolar interior to tooth line, visible from the 

 exterior. Second upper premolar longer than any of its corresponding molars. 



A prominent conical excrescence is on the lower gum, opposite the space between 

 the premolars, in front of which the point of the upper canine passes. Two much 

 less prominent excrescences are on the upper gum immediately above this lower 

 one. Type No. 527 ^ , Las Vegas, V[era Cru]z, February 19, 1891. Collectors, H. L. 

 Ward and C. M. Teran. 



General reuiarlcs. — PiplstrelJus reywcrucii-i _dift'ev8 from P. suhflavns in 

 its smaller size, relatively longer thumb, and broNvner, less yellow color. 



