400 HTLID^. 



olivaceous, without spots ; a pale area below tte eye ; lip faintly 

 marbled. From snout to vent 26 millim. 

 Costa Eica. 



101. Hyla miotympanum. 



Hyla miotympanum, Cope, Proc. Ac. Philad. 1863, p. 47; Peters, 



Hon. 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 ohoanae, converging posteriorly. 

 Snout broadly rounded; canthus rostralis short; loreal region oblique; 

 tympanum extremely smaU, scarcely distinct. Outer fingers one- 

 fourth, toes extensively webbed; disks larger than the tympanum. 

 The hind limb being carried forwards along the bo_dy, 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 n.ot well separated from the 

 abdominal shade ; lower surfaces yellowish. From snout to vent 

 37 millim. 



Jalapa, Mexico. 



102. Hyla graoilipes. 



Hyla gracilipes, Cope, Proc. Ac. Philad. 1866, p. 194, 



Tongue elongate, free behind. Vomerine teeth in two small 

 groups between the choanae. 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 stauflFeri. 



Hyla staufferi. Cope, Ib-oc. Ac. Philad. 1866, p. 195. 



Tongue rounded, a border only free. Vomerine teeth in fasciculi 

 between ohoanae. 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] 



