
750 The American Naturalist. [August, 
head, 31; length of ear, from notch between antitragus and conch to 
anterior point of margin, 25; length of antitragus, 7; height of 
antitragus, 4.5 ; height of tragus at inner border, 2.5 ; height of tragus 
at outer border, 4.5; width of tragus at top, 2.5; ears unite at base 
for 3.5; length of forearm, 60; length of thumb, not including meta- 
carpal, 8. Second digit—metacarpal, 55. Third digit—metacarpal, 
58; first phalanx, 24; second phalanx, 22; cartilaginous tip, 7 
Fourth digit—metacarpal, 56 ; first phalanx, 21; second phalanx, 2. 
Fifth digit—metacarpal, 29; first phalanx, 20; second phalanx, 5. 
Interspace between tips of third and fourth digits, 31; interspace 
between tips of fourth and fifth digits, 60; interspace between tip of 
fifth finger and attachment of membrane to tibia, 60; extent of out- 
stretched wings, 357; length of tibia, 18; length of foot, 13; 
length of calcaneum (poorly defined), about 16. 
Type, and only specimen, No. 516 % ad. Tacubaya, D. F., Mar., 
1887. Collector, Louis G. Ruoz. 
A comparison of the measurements of this species with macrotis shows 
that although the length of ear, forearm, and peculiarly short second 
phalanx of the fourth digit are the same in the two species, yet depressus 
is considerably the larger bat of the two. | 
CENTURIO MINOR, sp. nov.—I have in hand an adult female Centurio 
that I cannot identify with either C. senex or m murtrii, because of 
some apparent differences in the cutaneous folds of the chin, and 
because of differences in measurements that I cannot believe to be due 
to individual variation. Unfortunately the collector commenced to 
make a skin of the specimen, dissecting the head to forward of the 
eyes, before deciding to preserve it in alcohol. For this reason I give 
only a figure of the lower jaw, for I know by experience 
that at best I could make but a guess at what was the 
sAN Original shape of the head. Forttnately the specimen 
has never been permitted to dry, so that the cutaneous 
folds and ears are in their normal condition. 
The specimen contained a (about half-ripe) foetus 
Fig b. that is preserved entire, and that shows all the cutaneous 
Centurio minor. folds of the adult, and besides possesses a curious cone 
of skin springing from the occiput, looking like the top-knot of hair 
of macmurtrii as figured in the Biologia Centrali-Americana. 
Description of type, No. 525 female ad, Cerro de los Pajaros, Las 
Vegas, Vz., July or August, 1888. Collector Carlos M. Teran. 
Color, above Brocolli-brown, lighter on occiput and neck, darker 
toward the tail. Each hair three-zoned ; base brown, middle white, 

Ee a Coes ET 



