ART. 19 BATS OF THE GENUS TADARIDA — SHAMEL 15 



of the fur on the back, as described above, is different from that in 

 any other American Tadarida. The second phalanx of the fourth 

 finger is longer than the first phalanx, while in all other members of 

 this group it is shorter. 



TADARIDA YUCATANICA (Miller) 



1876. Nydinomus gracilis Dobson, Proc. Zool. Soc. London, p. 731, November 7 



(part) . 

 1902. Nyctinomops yucatanica Miller, Proc. Acad. Nat. Sci, Philadelphia, p. 



393, September 3, 1902. 

 1912. Nyctinomus yucatanicus Miller, List N. Amer. Land Mamm. 1911, 



Bull. U. S. Nat. Mus. 79, p. 70, December 31, 1912.. 

 1923. Tadarida yucatanica Miller, List North Amer. Recent Mamm. 1923, 



Bull. U. S. Nat. Mus. 128, p. 87, April 29, 1924. 



Type locality. — Chichen Itza, Yucatan. Type-specimen in United 

 States National Museum. 



Geographic distribution. — Yucatan and Guatemala. 



Diagnosis. — This species is nearest the Brazilian Tadarida europs, 

 but it has a larger skull, total length 17.6-18.2 mm. as against 16.5- 

 17.0 mm., and a longer tibia 12.6-13.8 mm. as against 11.2-12.0 mm. 

 The palatial emargination is present, but very small. 



Measurements. — For detailed measurements see tables, page 22 

 and 27. 



Specimens examined. — One hundred twenty-four specimens were 

 examined from the following localities: Chichen Itza, Yucatan, 12 

 skins, including the type; Flores, Peten, Guatemala, 29 skins, 52 

 alcoholics, and 31 skeletons without skins. 



Remarks. — The specimens from Guatemala recorded by Dobson 

 under the name Nyctinomus gracilis (1876)^ undoubtedly pertain to 

 this form. This bat is not very different in size from members of the 

 brasiliensis group, but its deep reddish brown color is diagnostic. 



TADARIDA MACROTIS (Gray) 



1839. Nyctinomus macrotis Gray, Ann. Nat. Hist., vol. 4, pp. 5-6, September, 1839. 



(Cuba.) 

 1843. Dysopes auritus Wagner, Wiegm. Archiv., vol. 1., p. 368. (Cuyaba, 



Brazil.) 

 1876. Nyctinomus megalotis Dobson, Proc. Zool. Soc, London, pp. 728-729, 



November 7, 1876. (Surinam.) 

 1878. Nyctinomus megalotis Dobson, Catal. Chiroptera Brit. Mus., pp. 434r-435. 

 1878. Nyctinomus magrotis Dobson, Catal. Chiroptera Brit. Mus., pp. 435-436. 

 1891. Nyctinomus depressus Ward, Amer. Nat., vol. 25, pp. 747-750, August, 



1891. (Federal District, Mexico.) 

 1894. Nyctinomus macrotis nevadensis H. Allen, Monogr. Bats. N. Amer. (1893), 



p. 171, March 17, 1894. (CaUfornia.) 

 1900. Promops affinis J. A. Allen, Bull. Amer. Mus. Nat. Hist., vol. 13, pp. 



91-92. December, 1900. (Colombia.) 



' Proc. Zool. Soc. London, p. 731, 1876 



