NYCTINOMUS. 629 
Ears close together at base of inner margins; tragus short, rounded 
above; muzzle projecting beyond lower lip, broad, obliquely truncate; 
upper lip grooved with vertical wrinkles, expansible; first and fifth 
toes thickest; long curved hairs on back of all the toes; premaxille 
separate in front, or joined only by cartilage; upper incisor at base 
in contact with canine, the cusps converging inward and forward. 
BEY -1O THE SPECIES. 
A. Upper lip with vertical wrinkles. 
a. Forearm under 50 mm. PAGE 
a.’ General color reddish brown.........../ N.antillularum 629 
Pee DOW e PROT 8 DLOWM sc oc. ee wie ee od N.mexicanus 629 
c.’ Above broccoli brown.................N. bahamensis 630 
By eG EA WOW es Fes cts peas we aa wad N. musculus 630 
Be moreari Met 40 MUN hae se Re rl ce ed NV. minutus 630 
590. antillularum (Nyctinomus), Miller, Proc. Acad. Nat. Scien. 
Phila., 1902, p. 398. 
DoMINICAN FREE-TAILED Bat. 
Type locality. Roseau, Island of Dominica. 
Geogr. Distr. Islands of Dominica, Montserrat, St. Kitts, and St. 
Lucia. 
Genl. Char. Size small. First lower molar minute and without 
distinct cingulum. 
Color. Like N. macrotis, with red and brown phases. ; 
Measurements. Total length, 83; tail vertebrae, 30; forearm, 47.4; 
thumb, 7; second finger, 38; third finger, 70; fourth finger, 58; fifth 
finger, 40; tibia, 12; foot, 6.6; ear from meatus, 15; from crown, 11.4; 
width, 15. Skull: greatest length, 16; basal length, 14.8% basilar 
length, 12; median palatal length, 6; interorbital constriction, 3.8; 
zygomatic breadth, 9; breadth of braincase above roots of zygomata, 
8; mandible, 11; length of upper tooth row, 5.8; lower tooth row 
(both exclusive of incisors), 6. 
591. mexicanus (Nyctinomus), Sauss., Rev. Mag. Zodl., 2me Sér., 
S11, 1560; p. 283, 
mohavensts Merr., N. Am. Faun., No. 2, 1889, p. 25. 
MEXICAN FREE-TAILED Bat. 
Type locality. Cofre de Perote, State of Vera Cruz, Mexico, 
13,000 feet elevation. 
Geogr. Distr. Volcano of Popocatapetl, through northern Mexico 
and the United States. Lower California. 
Genl. Char. Ears square, extending beyond nose when turned 
forward, very large, rounded, with a well-defined vertical crest behind 
