THE FAMILIES AND GENERA OF BATS. 
127 
Genus LONCHORHINA Tomes. 
1863. Lonchorhina Tomes, Proc. Zool. Soc. London, p. 81. 
1878. Lonchorhina Dobson, Catal. Chiropt. Brit. Mus., p. 461. 
Type-species. — Lonchorhina aurita Tomes. 
Geographic distribution. — West Indies (Trinidad and the Baha- 
mas) and Venezuela. 
Number of forms. — The type-species is at present unique. 
Characters. — Dental formula : 
-2 3. 1. — 34567 v 2 - 2 
12 -. 1.-234567 *2 -2’ 
c 
1-1 
1 - 1 ’ 
jpm 
2-2 
3-3’ 
m 
3- 3 
3-3 
=34. 
Teeth essentially as in Micronycteris except that crowns of lower 
incisors are wider (width about equal to height), the outer upper 
incisor has a distinctly hooked point close to inner tooth and a flatfish 
heel extending outward and backward, the second lower premolar 
(pm s ) is smaller than either of the others, and the anterior upper 
premolar “is scarcely larger than outer incisor. Skull showing a 
curious resemblance to that of Chilonycteris / a distinct concavity at 
base of rostrum between orbits ; dorsal profile of nasals strongly con- 
vex, the anterior extremity of the bones projecting over the nares as 
a conspicuous, slightly downward-curved point; middle of braincase 
low, not rising conspicuously above occiput as in Micronycteris ; basi- 
sphenoid pits very large and distinct, so carried forward that the an- 
terior edge slightly overhangs; audital bullse small, as in Micronyc- 
teris. Ears large, separate. Noseleaf very large, the horizontal 
portion with thickened ridge in front of nasal openings. Tail much 
longer than femur, produced to edge of wide interfemoral membrane. 
Species examined. — Lonchorhina aurita Tomes. 
Remarks. — This strikingly characterized genus appears to be not 
distantly related to Micronycteris and Otopterus , with which it agrees 
fairly well in the structure of the teeth and, except for the peculiar 
rostrum, in the form of the skull. The resemblance to Chilonycteris 
pointed out by Dobson appears to be wholly superficial. 
Genus DOLICHOPHYLLUM Lydekker. 
1838. Macrophyllum Gray, Mag. Zool. and Bot., II, p. 489. Not Macrophylla 
Hope, 1837. 
1878. Macrophyllum Dobson, Catal. Chiropt. Brit. Mus., p. 468. 
1891. Dolichopliyllum Lydekker, in Flower and Lydekker, Mammals, living 
.and extinct, p. 673. 
Type-species. — Phyllostoma macrophyllum Wied. 
Geographic distribution. — Brazil. 
Number of forms. — Only the type species is thus far known. 
