HYLONYCTERIS. MONOPHYLLUS. 675 
152. Hylonycteris. 
‘ 2—2 3 3 
“C= P.—; M2 = 30. 
a | Sreasd 3 3 
es a I 3 
Hylonycteris Thomas, Ann. Mag. Nat. Hist., 7th Ser., x1, 1903, 
p. 286. Type Hylonycterts underwoodi Thomas. 
External characters as in Cheronycteris; upper incisors very small; 
lower incisors absent; no diastema behind upper canines; skull with 
elongated bony palate, posterior nares level with middle of glenoid 
surfaces; basioccipital with a prominent median ridge continuous with 
a similar vomerine ridge, and deeply excavated on each side; no 
zygomatic arch. 
635. underwoodi (Hylonycteris), Thomas, Ann. Mag. Nat. Hist., 7th 
Ser., XI, 1903, p. 287. 
UNDERWOOD’s Bat. 
Type locality. Rancho Redondo, Costa Rica. 
Geogr. Distr. Rancho Redondo and Tarbaca, Costa Rica, Central 
America. 
Genl. Char. Muzzle medium length; nose-leaf small, narrow, 
pointed without distinct midrib; ears with inner margin convex, tip 
rounded, outer margin slightly concave above, then convex, the 
pointed antitragal portion separated by a deep notch; wings from 
the ankles; wing and interfemoral membranes bare; tooth rows diver- 
ging posteriorly. 
Color. Seal brown above, crown nearly black; under parts paler. 
Measurements. ‘‘Nose-leaf, 5.3; ear, 11.5; thumb and claw, 10; 
index, 32; third finger, metacarpal, 33.5; first phalanx, 14; second 
phalanx, 18.5; fifth finger, metacarpal, 29; first phalanx, 7.3; second 
phalanx, 11; tibia, 12; foot and claws, 9.8; calcar, 6; tail, 6; inter- 
femoral at center, 13. Skull: greatest length, 13; basal length, 20.3; 
interorbital breadth, 4.2; breadth of braincase, 8.6; palatal length, 
14.2; front of canine to back of third upper molar, 8.5; same to back 
of third lower molar, 8.8; tip of muzzle to back of zygoma root, 9.8.”’ 
(Thomas, l. c.) 
153. Monophyllus. 
— C.—; ae = = Vie 
=" 
Monophyllus Leach, Trans. Linn. Soc., x11, 1820, p. 75. Type 
Monophyllus redmani Leach. 
Nose-leaf, ears, and tragus as in the genus Glossophaga; muzzle 
longer, broader; tongue longer, covered with filiform papille; tail 
