ART. 19 BATS OF THE GENUS TADAEIDA — SHAMEL 11 



Geographic distribution. — The islands of Dominica, St. Lucia, 

 Guadeloupe, Montserrat, Antigua, Barbuda, St. Kitts, and Porto 

 Kico. 



Diagnosis. — Size small for the genus, forearm 36.6 to 41.4 mm., 

 usually less than 40.0 mm.; length of tibia, 10.0 to 12.4 mm., usually 

 less than 12.0 mm.; length of skull, 14.6-16.5 mm., usually 16.0 mm. 

 or less. There are two color phases, mummy brown and russet. Ear 

 falling short of the end of muzzle when laid forward. 



Measurements. — For detailed measurements see tables, pages 21 

 and 26. 



Specimens. — One hundred eighty-four from the following islands: 

 Dominica, 34 alcoholics, 2 skins; St. Lucia, 11 alcoholics; Guadeloupe, 

 18 alcohoHcs; Montserrat, 2 alcohoUcs; Antigua, 21 alcoholics; 

 Barbuda, 11 alcoholics; St. Kitts, 8 alcohohcs, 2 skins; Porto Rico, 42 

 alcohoUcs, 3 skins U.S.N.M., 30 alcoholics A. M. N. H. 



MACROTIS GROUP 



The skulls in the members of the macrotis group are characterized 

 by the long narrow rostrum, which is scarcely wider anteriorly than 

 at the point of the least interorbital breadth; rather well developed 

 sagittal crest; palate sometimes without an anterior emargination 

 (macrotis) or with a very narrow one (laticaudata, yucatanica, europs, 

 femorosacca) ; upper incisors set closely at their base, nearly touching, 

 and extending in a parallel position downward; lower incisors four. 



At the angle of the tibia and femur there is a conspicuous fold of 

 membrane which forms a pocket on the under side. With the excep- 

 tion of Tadarida europs and T. yucatanica the animals are larger than 

 the members of the brasiliensis group. The spines on the nasal 

 border are sometimes continued downward as two lines between the 

 nasal apertures converging in the middle until they touch, though 

 sometimes they form a single line; but alwa5^s there are two distinct 

 lines at the base. Tragus somewhat as in members of the brasiliensis 

 group, but not squarely truncate, its upper posterior corner bearing 

 a small projection. Antitragus higher than wide. The ears are 

 large; they extend well beyond tip of muzzle when laid forward, and 

 their inner margins are united for about 2 mm. at base. 



The second phalanx of the fourth finger is short, 2.0-4.4 mm. in 

 all the specimens measured, and of equal length with the first phalanx, 

 except in T. europs, where it is slightly longer than the first. When 

 compared with the length of the forearm it is found to range from 

 3.5 per cent in T. marcrotis to 9.5 per cent in T. europs. 



TADAMDA AUMSPINOSA (Peale) 



1848. Dysopes aurispinosus Peale, U. S. Expl. Exp., vol. 8, Mammalogy and 



Ornithology, p. 21. (Ed. 1.) 

 1858. Molossus aurispinosus Cassin, U. S. Expl. Exp., vol. 8, Mammalogy and 



Ornithology, pp. 5-7. (Ed. 2.) 



