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NORTH AMERICAN FAUNA. 



1878. Vespcrtilio caroUi Dobsou, Catal. Chiroptera Brit. Mns., p. 325. 



1893. Vespertilio gryphus Var. (a) Vespertilio gryplms lucifugus H. Allen, Monogr 



Bats N. Am., p. 78. 

 1893. Vespertilio albescens affinis H. Allen, Monogr. Bats N. Am., p. 93. 

 1897. Vespertilio lucifugus austroriparius Khoads, Proc. Acad. Nat. Sci. Phila., p. 227, 



May 1897. (Tarpon Springs, Florida.) 



Type locality. — Georgia, probably southern Liberty County. 

 Oeographic distrihution. — The wliole of North America north of the 

 southern boundary of the United States, except in the Rocky Moun- 

 tains and on the Pacific coast of California, Oregon, Washington 

 British Columbia, and southern Alaska. 



General characters. — Size medium; length 80 to 90; forearm 36 to 

 40; tibia 14.6 to 16.6. Calcar slender, indistinct, about equal in length 

 to free border of uropatagium, usually terminating in a faintly indicated 



lobule; keel very slightly developed, if 

 at all. Free border of uropatagium 

 naked. Ears short, laid forward tliey 

 reach about to nostril. 



Uars. — The ears (fig. 13, c) are short 

 and ])ointc(l, reaching when laid forward 

 barely to tip of nose. Tlie anterior bor- 

 der is straight from base through lower 

 third, then for a short distance strongly 

 convex, and finally straight to narrowly 

 rounded ofi' tip. Posterior border gently 

 concave from just below tip to about 

 middle, where it becomes convex and 

 continues so to basal notch. Basal 

 notch moderately developed, isolating 

 a broad but not conspicuous basal lobe. 



Tragus short, blunt, bent slightly 

 forward. Anterior border straight or 



F>G. 13.^ar of (a) Myotis subulatus, (1) ^^^g^^t\y COUCave from baSC tO tip. POS- 



M. keenii, (c) M. lucifvg^is, and (d) M. tcrior bordcr Straight or slightly con- 

 aiascensis ^^^^ immediately below tip, then more 



strongly convex to notch above large and prominent basal lobe. Greatest 

 width of tragus through basal lobe or at about middle height, accord- 

 ing to convexity of posterior border. 



Membranes. — Membranes rather thick and leathery, entirely naked 

 except where fur of body extends in a narrow line at the base of the 

 wings and uropatagium. On the latter the fur occupies about the 

 basal fourth on the dorsal side, rather less ventrally. The wings are 

 attached at the base of the toes. 



Feet. — The feet are large and strong, slightly more than half length 

 of tibiae. Toes longer than sole, joined by membrane at base to a 

 point slightly beyond middle of proximal phalanges. The membrane 

 extends farther on first digit than on fifth. 



