MAMMALS OF MINNESOTA. 33 
termination, fourth digit, I, 2.10; II, 0.5; III, 0 6; also a curved 
nail curved in the reverse direction, fifth digit, I, 1.7; I, 0.35; 
III, 0.35; femur, 0.8; tibia, 0.9; interfemoral spur, 0.75. 
The facial portion of the skull is much higher in the speci- 
men figured than represented by Allen. Conspicuous is the 
sharp downward spur of the molar process of the temporal, and 
the downward inclination of the pterygoid. 
The last molar above is greatly compressed and the anterior 
premolar may be absent. 
GENUS SCOTOPHILUS. 
(=Vesperus, Coues.) 
Dental formula 7%. 3, c. 1, m. #x2=82. 
The dental formula must alone be relied upon to distinguish 
this and the next two following genera or sections for though 
other characters exist they are not susceptible of exact formu- 
lation, but consist rather in a peculiar habitus which must be 
seen to be appreciated. 
Scotophilus fuscus BEAUVOIS. 
BROWN BAT. 
Vespertilio fuscus BEAUVOIS. Cat. Peale’s Mus., 1796. 
LECONTE. Proc. Acad. Nat. Sci., 1855. 
Vespertilio arcuatus SAY. Long’s Exp. Rocky Mts., 1823. 
Vespertilio phaiops RAFINESQUE. Am. Month. Mag., 1818. 
LECONTE. Proc. Acad. Nat. Sci., 1855. 
WAGNER. Schreb. Siiug., 1855. 
Vespertilio wrsinus. TEMMINCK. Monog. Mam., 1835. 
Max. V. WieD. Archiv. Naturg. 1861. 
Vespertilio gryphus Fr. CUVIER. Ann. Mus. 1837. 
WAGNER, Schreber’s Siiug., 1875. 
Vespertilio caroli LECONTE. Proc. Acad. Sci., 1855. 
Scotophilus fuscus H. ALLEN. Monogr. N. Am. Bats.., 1864. 
J. A. ALLEN. Cat. Mam. Mass., 1869. 
Scotophilus carolinensis GEOFFROY, HARLAN, GODMAN, LECONTE, CoOPER, 
DEKAY, TEMMINCK, H. ALLEN, ETC. 
Vespertilio (Vesperus) fuscus CouES. Surv. 100th Mer., Zool., 1875. 
Head flat, nostrils large, separated by an emargination; ear 
less than head, broad at the base, obtuse at tip; tragus about 
one-half as high as the auricle, notched externally at base. 
Interfemoral membrane ample, basal portion furred; terminal 
segment of tail exserted. Wing membrane attached to base of 
toes; spur well developed. Color on the back dusky brown, 
