400 HTLID^. 



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, 



^3Ion. Bed. 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 choanse, converging posteriorly. 

 Snout broadly rounded; can thus 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. Pldlad. 1865, p. 194. 



Tongue elongate, free behind. Vomerine teeth in two small 

 groups between the choanse. 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 

 Tent 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 choanse. 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, 



