8 PKOCEEDINGS OF THE NATIONAL MUSEUM VOL.78 



Geographic distribution. — Louisiana, Alabama, Florida, Georgia, 

 and South Carolina. 



Diagnosis. — The skull, which is constantly 17.0 mm. or over in its 

 total length, is like its South American ally T. brasiliensis; but larger 

 than T. mexicana whose skull is usually less than 17.0 mm. The 

 uniformly short tibia and ear are the most reliable characters to 

 separate it from both T. brasiliensis and T. mexicana. The color 

 runs more uniformly toward the darker shade for the genus. 



Measurements. — For detailed measurements see tables, pages 20 

 and 25. 



Specimens examined. — Two-hundred fifty-eight specimens from the 

 following locaUties: Louisiana: Houma, 77 alcoholics; New Orleans, 

 33 alcohoUcs. Alabama: Orange Beach, 1 skin; Greensboro, 30 

 alcoholics. Georgia : Savannah, 1 skin, 1 alcoholic. Florida : Gaines- 

 ville, 20 skins, 74 alcoholics; Kissimmee, 1 skin; Wacissa River, 

 1 skin; southern Florida, 1 skin; no exact locality, 10 alcoholics. 

 South Carolina: Columbia, 8 sldns. 



WEST INDIAN FORMS 



Taken as a whole the Antillean members of the genus Tadarida are 

 smaller than the mainland forms. The differences that I have been 

 able to find, among these island forms themselves, are in averages 

 rather than individual measurements. The insular forms divide 

 reasonably well into two groups, a southern group including those 

 found on the islands from Dominica up to and including Porto Rico, 

 a northern group including those found on the islands of Jamaica, 

 Hispaniola, Cuba, and the Bahamas. In the northern group the skull 

 ranges in total length from 16.0-16.8 mm., or always 16.0 mm. or 

 over. In the southern group the total length of the skull ranges from 

 14.6-16.5 mm. (usually less than 16.0 mm.). The ear in members of 

 the northern group is longer, extending, in alcoholic specimens, to the 

 edge of the nostril when laid forward. This last statement is not 

 true of the Jamaican form, as it has a short ear, but I have placed it in 

 the northern gi-oup because of the uniformly larger skull. In the 

 southern group the ear is shorter; it fails to reach the edge of the 

 nostril by about 2 mm. when laid forward. 



TADARIDA BAHAMENSIS (Rehn) 



1902. Nyctinomus bahamensis Rehn, Proc. Acad. Nat. Sci. Philadelphia, p. 641, 



December 12, 1902. 

 1911. Nyctinomus brasiliensis bahamensis G. M. Allen, Bull. Mus. Comp. Zool., 



vol. 59, p. 245, July, 1911. 

 1923. Tadarida bahamensis Millee, N. Amer. Recent Mammals 1923, Bull. 



U. S. Nat. Mus. 128, p. 85, April 29, 1924. 



