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; premaxills 

 separate in front, or joined only by cartilage; upper incisor at base 

 in contact with canine, the cusps converging inward and forward. 



KEY TO THE SPECIES. 



A. Upper lip with vertical wrinkles. 



a. Forearm under 50 mm. PAGE 



a/ General color reddish brown N. antillularum 629 



b/ Above Prout's brown , .N. mexicanus 629 



c/ Above broccoli brown .V. bahamensis 630 



d/ Above seal brown N. musculus 630 



b. Forearm under 30 mm .V. 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, n; length of upper tooth row, 5.8; lower tooth row 

 (both exclusive of incisors), 6. 



591. mexicanus (Nyctinomus}, Sauss., Rev. Mag. Zool., 2me Se"r., 



xii, 1860, p. 283. 



mohavensis 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 



