Cope.] *^^^ [Nov. 17, 



Costa Rica. That species, however, lias no digital webs, and the tym- 

 panic membrane is only half as large, its transverse diameter being only a 

 quarter of that of the eye fissure. The vomerine teeth also are not so 

 close together. Specimen No. 288 is a female, and is distended with eggs. 

 There are no traces of dermal folds. In No. 333 there are traces of the 

 folds. Dr. Boulenger (^Gatal. Batr. Sal. Brit. Mas., Ed. ii, p. 201) 

 describes a species of Liohyla under the name of Hylodes palmatus, 

 although he places under it as synonymous the older names of Liyla 

 {Liohyla) guentherii Keferstein and L. rugulosa Cope. The size of the 

 tympanum, and length of hind limb are indefinitely described, but the 

 back and sides are said to be tubercular, which is not the case in this 

 species. Mr. Boulenger also states, rather indefinitely, that the toes of 

 liis H palmatus are "one- third webbed." The palmation in L. ranoides 

 extends to the extremity of the metatarsals. This is one-third the length 

 of the first and second digits, but much less than a third the length of the 

 other digits. 

 The eggs of this species are of extraordinary size, equaling large peas. 



LiTHODYTES FLORULENTUS, Sp. UOV. 



In introducing a new species of Central American Lithodytes. it is 

 necessary to point out clearly the distinctive features of those alreadj^ 

 known. I confine my attention at present to the species with plain 

 frontoparietal bones, and therefore omit further reference to the L. pel- 

 viculus, L. megacephalus and L. gulosus, where there is a crest along the 

 superolateral angle of the skull. The other species differ as follows : 



I. Heel not reaching the muzzle. 

 Vomerine patches widely separated ; digital dilatations large ; colors 



plain L. diastema Cope. 



Vomerine patches close together ; digital dilatations small ; colors varie- 

 gated L. -florultntus Cope. 



II. Heel of extended leg reaching muzzle or beyond. 



«• Tympanic drum equal half to two-thirds diameter of orbit. 



Digital dilatations small, especially on hand L. rhodopis Cope. 



a. Tympanic drum small, one-fourth diameter of orbit. 

 Digital dilatations large, especially on hand L. melanostictus Cope. 



The only specimen of the L. florulentus is damaged as to the integu- 

 ment of its head, which has been destroyed by agencies unknown to me. 

 The skull with its muscles, and the rest of the body with the integument, 

 are preserved. The head is short and depressed, and the canthusrostralis is 

 not distinct. The length of the muzzle from tlie nostril to the orbit is about 

 equal to the anteroposterior diameter of the latter, and the nostril is quite 

 near the end of the nose. The tongue is subround, and is a little wider 

 than long in its present condition. The internal nares are well forwards ; 

 and the vomerine teeth are in two fascicles which are close together, and 

 are so far posterior to the nares as to be in transverse line with the pala- 



