ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 103 



ARCIFERA. 

 18. Htla 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. 



M. 

 Length of head and body ........ .056 



" of head to angle of jaws . . . . . . .016 



Width of head at angle of jaws . . . . . . . .020 



Length to orbit 007 



to axilla 022 



of fore limb 032 



of hind limb 093 



of hind foot 040 



This tree-frog resembles the Smilisca baudinii, 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. Htla uranochroa, Cope, sp. nov. 



A species of the size of the Hyla 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 



