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Show 712 MR. G. E. DOBSON ON THE MOLOSSI. [NOV. 7, tragus 0"*08x0"*02; forearm 2"*0 ; thumb 0"*3 ; second finger -metacarp. 2"*05, 1st ph. 0"*95, 2nd ph. 0"*95; third finger- metacarp. 2"0, 1st ph. 0"75, 2nd ph. 0"*15; fourth finger-metacarp. 1"-2, 1st ph. 0"*5, 2nd ph. 0"*22; tibia 0"*7 ; foot and claws 0"4. Hab. Brazil; Central America (Guatemala). The above description has been taken from an adult male specimen obtained by Mr. Salvin in Guatemala, and preserved in alcohol in the collection of the British Museum. The only other specimens known are imperfectly preserved skins, the types of M. nasutus, and M. furnarius, Spix, of which the first intelligible description was published by Dr. Peters. This species is quite intermediate between M. rufus (Subg. Molossus) and M. abrasus (Subg. Promops), agreeing with the former in the form of the ear, and even in the distribution of the fur, with the latter in the form and number of the teeth. 6. MOLOSSUS ABRASUS. ? Molossus ater, Geoffroy, Annal. du Mus. vi. (1805) p. 153. Dysopes abrasus, Temminck, Monogr. Mammal, i. p. 232, ii. p.356 (1835-41); Wagner, Suppl. Schreb. Saugeth. i. p. 475(1844), v. p. 710 (1855). Dysopes longimanus, Wagner, Wiegm. Archiv, 1843, p. 367; Suppl. Schreb. Saugeth. 1855, p. 709. Dysopes leucopleura, Wagner, /. c.; Burmeister, Thiere Brasiliens, p. 73 (1854). Molossus abrasus, Peters, Mon. Akad. Berlin, 1865, p. 574. Ears much shorter than the head, but conspicuously larger than in M. rufus, united by their bases only on the muzzle at a point equally distant from the anterior commissure of the eyelids and the nostrils ; outer and inner margins of the ear regularly convex, forming together almost a perfect arc of a circle ; antitragus half-cordate, with a broad base, separated behind by a deep notch; keel of the ear-conch well-developed, thickened and expanded externally in lower half; tragus minute, linear, subacutely pointed, slightly larger than in M. rufus, but with a broad base. Muzzle obtuse, nasal apertures directed forwards and slightly outwards, the end of the nose scarcely projecting beyond the margin of the upper lip, which is separated from the margin of the nostrils by a space less wide than in M. rufus ; the external margins of the nostrils more prominent than in that species, and continued upwards and inwards above the nasal apertures, and downwards between them in a conjoined ridge to the margin of the lip ; the upper margin of the nasal disk thus formed on each side is finely and evenly toothed, and the internasal ridge covered with short spoon-shaped hairs, similar to those forming a broad patch between the nostrils and upper lip in M. rufus, but strictly limited to this ridge ; the margin of the upper lip in front is fringed with straight hairs. Wings from the ankles, or from the tibiae slightly higher.up. Gular sac distinct in cS, rudimentary in $ . |