130 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 
Number of forms. — Three species of Anthorhina are now known. 
Characters. — Teeth essentially as in Mimon , the dental formula the 
same, and the inner upper incisor similarly vertical; anterior upper 
premolar (pw % 3 ) scarcely larger than outer incisor; lower incisor 
with crown about as wide as high, and cutting edge faintly trifid ; 
lower molars like those of Micronycteris. Skull not strikingly differ- 
ent from that of Mimon , but rostrum with indication of median 
groove, basisplienoid pits deep and distinct, and audital bullae large, 
each covering more than half of cochlea, their height on inner side 
much greater than width of basioccipital. Ears large, separate. 
Tail about as long as femur, terminating at middle of very broad 
interfemoral membrane. 
Species examined. — Anthorhina crenulata ( Geoff roy ), and A.picata 
(Thomas). 
Genus PHYLLOSTOMUS Lacepede. 
1799. Phyllostomus Lacepede, Tabl. des Div., Sousdiv., Ordres et Genres des 
Mammif., p. 16 ( hastatus ). 
1800. Phyllostoma Cuvier, Legons d’Anat. Comp., Tabl. I (described in 
Tabl. Elem. d’Hist. Nat., p. 105, 1798). 
1866. Alectops Gray, Proc. Zool. Soc. London, p. 114 (ater=elongatam) . 
1878. Phyllostoma Dobson, Catal. Chiropt. Brit. Mus., p. 484. 
1901. Phyllostomus Miller and Rehn, Proc. Boston Soc. Nat. Hist., XXX, 
p. 282, December 27, 1901. 
Type-species. — V espertilio hastatus Pallas. 
Geographic distribution. — Tropical America, north to Honduras. 
Number of forms. — Eight forms of Phyllostomus are now known. 
Characters. — Dental formula : 
-2 3. 1. --3 45 6 7 .2-2 1-1 2-2 3-3 
1 2 1. - 2 - 4 5 6 7 * 2 - 2’ c 1 - 1 ’ pm 2 - 2 ’ m 3 - 3 -32 ' 
In form the teeth for the most part resemble those of Micronycteris , 
there being no essential differences in the molars, canines, and upper 
incisors of the two genera. Hypocone distinct though low in m 1 , 
obsolete in m 2 . Paraconids as in Micronycteris . Premolars with 
thick, rather short shafts, and slightly developed cingula. Middle 
upper incisor simple, somewhat projecting, the front surface nearly 
as long as high, the posterior surface slightly concave; lateral in- 
cisor short and blunt, scarcely rising to level of indistinct cingulum 
of canine and middle incisor. Upper canine with a broad flattish 
groove on anterior face of shaft and a less developed one on antero- 
outer face. Lower incisors forming a continuous, nearly straight row 
between cingula of canines, the outer tooth slightly smaller than 
inner; upper surface of crown slightly longer than height of ante- 
rior surface; cutting edge faintly trifid, the middle lobe smallest. 
Skull heavy and robust, with broad, rather low and flattish rostrum, 
