OTOPTERUS. 653 



36.8; fifth finger, metacarpal, 40.6; tibia, 21.5; foot, 12.7; ear, 30.5; 

 tragus, 11.4. Skull: occipito-nasal length, 23; zygomatic width, 12; 

 height of braincase, 9.5 ; interorbital constriction, 4; palatal length, 10; 

 postpalatal length, 8; mastoid breadth, n; length of upper molar 

 series, 8; length of mandible, 17 ; lower molar series, 9.5. 



615. mexicanus (Macrotus), Sauss., Rev. Mag. Zool., 2me Se>., xn, 



1860, p. 486. 

 SAUSSURE'S LARGE-EARED BAT. 



Type locality. District of Yautepec, near Cuautla, State of 

 Morelos, Mexico. 



Geogr. Distr. Tres Marias Islands, State of Jalisco, south to 

 States of Mexico and Oaxaca, Mexico. 



Genl. Char. Similar in size to O. waterhousii and 0. bocourtianus , 

 but paler in color ; deep groove on side of face beneath eye ; ears very 

 large, longer than head; outer margin of ear conch convex, rounded 

 above and with a notch opposite tragus ; tragus twice as long as broad , 

 pointed; under lip grooved; nose-leaf small, placed at end of muzzle. 



Color. Above dark grayish brown, basal position of fur white; 

 beneath gray tinged with rufous; membranes and ears pale brown. 



Measurements. Length of forearm, 50; thumb, 8.8; third finger, 

 metacarpal, 39; fourth finger, metacarpal, 36; fifth finger, meta- 

 carpal, 40; tibia, 21.5; foot, 12.7; ear, 30; tragus, 11.4; tail vertebrae, 

 26.4. Skull: occipito-nasal length, 21; zygomatic width, 12; inter- 

 orbital width, 4; height of braincase, 8; palatal length, n; length of 

 mandible, 16. 



616. californicus (Macrotus), Baird, Proc. Acad. Nat. Scien. Phil., 



1858, p. 116. Elliot, Syn. N. Am. Mamm., 1901, p. 420. 

 CALIFORNIA LARGE-EARED BAT. 



Type locality. Old Fort Yuma, San Diego County, California. 



Geogr. Distr. Lower California probably (obtained near the bor- 

 der), into southern California. 



Genl. Char. Similar to O. waterhousii Gray. Auricle longer 

 than head; basal lobes developed; nose-leaf with defined lower bor- 

 der; internal border of tragus thickened, and revoluted portion at 

 base of external border swollen; lower lip grooved with a small wart 

 on each side of the groove ; fur bicolor. 



Color. Above and below gray, base of fur white, terminal third 

 fawn. 



Measurements. Total length, 104; tail vertebrae, 38; tibia, 21; 

 foot, 12.7 ; forearm, 50.8 ; longest finger, 36 ; height of ear, 27.9 ; tragus, 

 10.6. Skull: occipito-nasal length, 20.5; zygomatic width, 12; 



