400 HYLID®. 
olivaceous, without spots; a pale area below the eye; lip faintly 
marbled. From snout to vent 26 millim. 
Costa Rica. 
101. Hyla miotympanum. 
Hyla miotympanum, Cope, Proc. Ac. Philad. 1863, p. 47; Peters, 
Mon. Berl, Ac. 1871, p. 651. 
— microtis, Peters, Mon. Berl. Ac, 1869, p. 880. 
Tongue slightly emarginate. Vomerine teeth in two elongate 
slightly oblique fasciculi between the choanee, converging posteriorly. 
Snout broadly rounded; canthus rostralis short; loreal region oblique; 
tympanum extremely small, scarcely distinct. Outer fingers one- 
fourth, toes extensively webbed; disks larger than the tympanum. 
The hind limb being carried forwards along the body, the tibio- 
tarsal articulation marks the tip of the snout. Skin smooth above, 
granulate beneath. Purplish ash above, with or without a few 
lighter specks and indistinct darker reticulations ; extremities paler, 
not barred; a light border from heel to toes, another bounding © 
superiorly a subanal spot; superior labial border and lateral stripe 
bright yellow, the latter sometimes not well separated from the 
abdominal shade; lower surfaces yellowish. From snout to vent 
37 millim. 
Jalapa, Mexico. 
102. Hyla gracilipes. 
Hyla gracilipes, Cope, Proc. Ac. Philad. 1865, p. 194. 
Tongue elongate, free behind. Vomerine teeth in two small 
groups between the choanz. Head flat,longer than broad ; canthus 
rostralis little concave; eyes little prominent, one half tympanic 
disk. Fingers elongate, free ; toes webbed at base only, remarkably 
elongate; the foot from tarsus a little longer than the tibia, and 
equalling, from axilla to middle of origin of femur, the width of the 
head. Colour above bright leek-green, with a brown band from the 
nostril through the tympanum to the middle of the side, white- 
bordered above, and a short band on each side of the ilium, white- 
bordered ; femora not spotted behind; limbs not cross-banded ; 
upper lip with a brown border; beneath whitish. From snout to 
vent 15 lines. 
Mexican tableland, N.E. of city of Mexico. 
103. Hyla staufferi. 
Hyla staufferi, Cope, Proc. Ac. Philad. 1865, p. 195. 
Tongue rounded, a border only free. Vomerine teeth in fasciculi 
between chuane. Head plane, depressed ; snout very prominent, 
rounded; canthus rostralis weak, straight ; lores flat, oblique. 
Fingers and toes short, the former free, the latter half webbed ; 
disks large. The hind limb being carried forwards along the body, 
