ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



103 



ARCIFERA. 

 18. Hyla gabbii, Cope, sp. nov. 



A rather large species resembling the Smilisca baudinii,D. B, Vomerine teeth 

 in two short transverse series between the interior nares. Choanse and ostia pha- 

 ryngea subequal; tongue round, scarcely free behind. Head short, wide; canthus 

 decided, concave ; nares much nearer each other than each one is to the orbit. 

 Membranum tympani less than half the area of the orbit. Integument of upper 

 surfaces nearly smooth. Fingers well webbed to the base of the penultimate 

 phalange of the longest ; toes webbed to near the end of the corresponding 

 phalange of the hind foot. Digital dilatations large, about equal to the tympanum. 

 Lower surfaces areolate. 



Color ashy-brown, the pigment forming a narrow band on the upper face of 

 the femur. Anterior and posterior faces of femur dusky, without coloration figure. 

 Some large irregular brown spots on the back, groin marbled with light-brown and 

 white. Lip with a faint pale border, no large spots on it or the lores. Tibia and 

 cubitus with broad pale-brown cross-bands ; lower surfaces all whitish. 



Length of head and body . 



" of head to angle of jaws 

 Width of head at angle of jaws 

 Length to orbit . 



"• to axilla 



" of fore limb . 



" of hind limb . 



" of hind foot . 



This tree-frog resembles the Smilisca baudinii, 



M. 

 .056 



.016 



.020 



.007 



.022 



.032 



.093 



.040 



but differs in the absence of the 



post-orbital process, the more extensive palmation of the fingers, and the absence 

 of the characteristic spots on the upper lip. It is dedicated to William M. Gabb, 

 of the Geological Survey of Costa Rica (formerly of Santo Domingo and of 

 California), to whom herpetological science is indebted for the collection now 

 described. 



From near Sipurio. 



19. Hyla tjranochroa. Cope, sp. nov. 



A species of the size of the Hi/la carolinensis, and related to it in general 

 structure. The vomerine teeth are in two fascicles exactly between the inner 

 nares, which are small and just equal to the ostia pharyngea in size. Tongue 

 round, little free. The head is wide and the muzzle rounded, the canthus rostralis 



