218 
BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 
Geographic distribution. — Central and eastern Asia. 
Number of forms. — Only the type species is yet known. 
Characters.- — Externally as in Nycticeius except that the fur has a 
distinct color pattern of white markings on a brown ground. Skull 
wider and not as deep as that of Nycticeius , the anterior palatal 
emargination relatively smaller than in any other member of the 
family, its greatest depth scarcely more than half as great as dis- 
tance between upper canines. Lachmyral region somewhat expanded, 
and anterior edge of orbit distinctly beaded and angular. 
Species examined. — Scotomanes ornatus (Blyth). 
Genus RHOGEESSA H. Allen. 
1866. Rhogeessa II. Allen, Proc. Acad. Nat. Sci. Philadelphia, p. 285. 
1873. Rhogoessa Marschall, Nomenclator Zoologicus, Mamm., p. 11. 
1878. Rhogeessa Dobson, Catal. Chiropt. Brit. Mus., p. 245 (subgenus of 
Vesperugo ) . 
1894. Rhogeessa PI. Allen, Monogr. Bats N. Amer. (1893), p. 132, March 
14, 1894 (genus). 
1897. Rhogeessa Miller, North American Fauna, No. 13, p. 122, October 
16, 1897 (part). 
Type-species. —Rhogeessa turnida H. Allen. 
Geographic distribution. — Warmer parts of America, north to Cen- 
tral Mexico. 
Number of forms. — Six species of Rhogeessa are currently recog- 
nized. 
Characters. — Like Nycticeius , but outer lobe of all three lower 
incisors obsolete and inner lobe practically absent also in the outer 
tooth, which is thus much reduced in size as compared with the other 
two, though its cutting edge, formed by the middle lobe, remains in 
line with the others, and functional. 
Species, examined. — Rhogeessa gracilis Miller, R. io Thomas, R. 
minutilla Miller, R. parvula H. Allen, R. turnida H. Allen, and R. 
peT^k Thomas. 
Genus BAODON Miller. 
1897. Rhogeessa Miller, North American Fauna, No. 13, p. 122, October 
16, 1897 (part). 
1906. Bceodon Miller, Proc. Biol. Soc. Washington, XIX, p. 85, June 4, 
1906. 
Type-species.- — Rhogeessa aileni Thomas. 
Geographic distribution. — Jalisco, Mexico. 
Number of forms. — The type is the only species known. 
Characters. — Like Rhogeessa , but with the reduction of the outer 
lower incisor carried so far that the tooth has become a mere function- 
less spicule less than one-twentieth as large as the first or second 
incisor, nearly concealed beneath cingulum of canine. Third upper 
molar with posterior portion slightly more reduced than in Rhogeessa. 
Species examined.— Bceodon aileni (Thomas). 
