l. fortidens they had only two specimens, the holotype from Teapa, Tabasco, and a referred specimen from Fort Hancock, El Paso County, Texas, approximately 1,200 miles north-northwest of Teapa. We have examined this specimen from Texas (U. S. Nat. Mus., 21083/36121, skin and skull) and regard it as Myotis lucifugus carissima Thomas. Furthermore, we regard the holotype of Myotis lucifugus fortidens Miller and Allen 1928 as specifically distinct from Myotis lucifugus of Miller and Allen 1928. The Cinnamon Myotis, described below, therefore may stand as:

Myotis fortidens Miller and Allen

Cinnamon Myotis

Type.—"Adult female (in alcohol) No. 88.8.8.18, British Museum (Natural History). Collected at Teapa, Tabasco, Mexico, by H. H. Smith, January 5, 1888. Presented by Messrs. Salvin and Godman [after Miller and Allen, Bull. U. S. Nat. Mus., 144:54, May 25, 1928]."

Range.—Known only from the lower part of the Tropical Life-zone of the region of the Isthmus of Tehuantepec and east and west coasts of Mexico.

Fig. 1. Map showing localities from which Myotis fortidens has been recorded.

Diagnosis.—Among American species of the genus, over-all size medium (total length 94 mm); body long (54); tail short (39); forearm of medium length (37); tibia short (14.5); foot long (58 per cent of length of tibia); wing membrane arising from side of foot at distal end of metatarsal; calcar simple (not keeled) and 7 mm long; ears 15 to 16 mm long measured in the flesh from the notch (posteroventral border of the meatus); tragus, measured from same place, 7 to 8 mm high with posterobasal lobe; third metacarpal longest and second metacarpal shortest; fifth shorter than fourth; ears brownish; membranes of wing and tail blackish; uropatagium almost hairless, the few hairs that are present being almost invisible; pelage of back 5 mm long with some overhairs 8 to 9 mm long; basal 3 mm of fur black, remainder Cinnamon-Brown (capitalized color terms, after Ridgway, Color Standards and Color Nomenclature, Washington, D. C., 1912); outline of skull viewed dorsally similar to that of Myotis lucifugus; sagittal crest well developed; distance across upper canines equal to or slightly exceeding interorbital constriction; braincase low; two premolars on each side in upper jaw and also in lower jaw, the one remaining small premolar in contact with both the canine and the fourth premolar.

Figs. 2-5. Four views of the skull of Myotis fortidens. No. 32112, University of Kansas Museum of Natural History, ♂, obtained 20 kilometers east-northeast Jesús Carranza, 200 feet elevation, Veracruz, Mexico, on May 16,