470 On a new Free-tailed Bat from Central America. LXII. — A ne7o Free-tailed Bat from Central America. By Gerrit S. Miller, Jr. A SPECIES of free-tailed bat represented by two skins from Cliiriqiii, submitted to me for determination by Mr. Oldfield Ihomas, is strikingly distinct from any hitherto known. In size and external appearance it suggests a small '^ Nyctinomus^^ of the gracilis-europs group ; but its skull and teeth show it to be a Promops related, notwithstanding its small size, to P. glaucinus. Promcps nanus, sp. n. Tifpe (in British Museum *). — Adult male (skin and skull), no. 56 collection of H. J. Watson, taken at Bogava, Chiriqui, Panama (alt. 250 m.), October 7, 1898. " Caught under the roof of a house." Character. — Essentially a miniature of Promops glaucinus ; forearm about 39 millim. instead of 56 millim., greatest length of skull 16"0 millim. instead of 22 millim. Uluzzle and lips. — >So lar as can be determined from the dried specimens, after relaxation of the parts, the lips are slightly less wrinkled than in P. glaucinus, and the pointed horny projections on the ridge above and between nostrils are even smaller and less distinct. Pars. — The ears are of the same form as in P. glaucinus ; laid forward they extend about 2 millim. beyond tip of muzzle ; their inner borders arise together on forehead, about 5 millim. behind tip of muzzle. In outline the conch is irregularly squarish, the anterior and superior borders about equal in length, the posterior much shorter, the corners bluntly rounded. Antitragus about two thirds as high as wide, its anterior and posterior borders converging regularly toward the bluntly rounded tip, the width of wiiich is a little less than half that of base. Keel well developed, its edge very noticeably thickened. Tragus minute, scarcely more than 1 millim. in length, its highest point at extremity of posterior margin. Feet and membranes. — The feet and membranes present no characters of importance. Wing attached at distal extremity of tibiai. Fur and colour. — The fur is not peculiar eitiier in quality or distribution. On middle of back it is about 5-5 millim. in length. General colour above dark bistre, very faintly washed * [Now registered as no. 0. 7. 11. 99.— 0. T.]
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