ART. 19 BATS OF THE GENUS TADARIDA — SHAMEL 3 



at point of least interorbital breadth; prominent sagittal crest; upper incisors 

 parallel. 



Forearm always 58.0 mm. or over. 



Total length of skull 22.2-24.0 mm macrotis, p. 15 



Forearm 50.0 mm. or less. 



Tibia over 15.0 mm aurispinosa, p. 11 



Tibia less than 15.0 mm. 



Total length of skull 18.0 mm. or over. 



Occipital depth of skull 6.4-7.0 mm laticaudata, p. 12 



Occipital depth of skull 6.0-6.4 mm femorosacca, p. 13 



Total length of skull usually 18.0 mm. or less. 



Basal length 13.5-14.2 mm europs, p. 14 



Basal length 14.6-15.2 mm yucatanica, p. 15 



BRAZTLIENSIS GROUP 



The skulls in this group are characterized by their broad, flat muz- 

 zle, which is considerably wider anteriorly than at the point of least 

 interorbital breadth; weak sagittal crest posteriorly; upper incisors 

 widely separated at their base by an anterior palatal emargination, 

 and converging strongly toward their tips. Lower incisors normally 

 six; but occasionlly only five or four. The outer incisors are very 

 small and are much crowded against the canines, sometimes absent 

 on one side or both. Their absence is most frequent in very young or 

 very old individuals. 



At the angle of the tibia and femur there is a small fold of skin on 

 the underside. The nasal border bears a series of rounded spiues; 

 this series is continued as a single line descending between the nasal 

 apertures. This descending line never divides at the base into two 

 branches as it does ui the macrotis group. The tragus is truncate; 

 antitragus low, wider than high. In all South American specimens 

 of T. brasiliensis, the ear reaches the end of the nostrU, when laid for- 

 ward, as it also does in T. intermedia, T. mexicana, T. bahamensis, T. 

 muscula, and T. constanzae. In T. cynocephola, T. antillularum, and 

 T. murina it falls short by about 2 mm. of the end of the rostrum 

 when laid forward. Ears in immature members of this genus are 

 always much shorter than those of the adult. 



The second phalanx of the fourth finger is long, 6.6-9.2 mm. in 

 all the specimens measured, or about three times as long as the first 

 phalanx of the same finger. When compared with the length of the 

 forearm it is found to range from 15 per cent in T. murina to 19.5 per 

 cent in T. cynocephala. 



TADARIDA BRASILIENSIS (I. Geoffroy) 



1824. Nyctinomus brasiliensis Geoffroy, Ann. Sc. Nat., vol. 1, p. 337. 

 1827. Dysopes nasutits Temminck, Monogr. Mamm., vol. 1, pp. 233-234 (Brazil.) 

 1840. Dysopes naso Wagner, Schreb. Saugeth. suppl., vol. 1, pp. 475-476 (Brazil.) 

 1864. Nyctinomus nasutus H. Allen, Monogr. Bats. N. Amer., p. 7, figs. 6, 7 

 (part) . 



