ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



95 



the summit of the Pico Blanco Mr. Gabb obtained the Gerrhonotus fulvus of 

 Bocourt, the only lizard obtained from above the base of the mountains, and the 

 extreme southern point of distribution of the genus Gerrhonotus, so far as yet 

 known. It is worthy of remark that the elevated regions between 2500 and 7000 

 feet are the habitat of four genera with rudimentary auditory apparatus, while 

 but one (Atelopus) presenting that character was discovered by Mr. Gabb in the 

 lower country. Three of the four genera of frogs with imperfect organs of hearing 

 known from South America, viz.: Abodes, Phrynobatrachus, and Telmatobius, are 

 also from mountainous regions. 



The Aguacate Mountains to the west of the plateau furnished a species of 

 lizard to the collection, the Chalcidolepis met alliens . 



The collection obtained by Mr. Gabb embraces eighty-nine species, viz. : 

 Testudinata, 5 ; Lacertilia, 19; Ophidic, 35; and Batrachia, 30. The number of 

 species not previously known to science is thirty-seven. A report on a collection 

 made by Dr. Van Patten in the valley of central Costa Rica was published by the 

 writer in the Proceedings of the Philadelphia Academy for 1871, p. 204, which 

 included forty-six species. Of these twenty-six do not occur in Mr. Gabb's collec- 

 tion. The names of these species are as follows: — 



B A TRA CHI A. 



Agalychnis moreletii, Durn. 

 Sinilisca baudinii, Dum. Bibr. 



LA GER TILIA. 

 Phyllodactylus. 

 Cyclura acanlhura, Wiegm. 

 Sceloporus malachiticus, Cope. 

 Anolis hoffmannii, Peters. 

 Anolis nannodes, Cope. 

 Anolis insignis, Cope. 

 Anolis microtus, Cope. 



OPHIDIA. 



Epicrates cenchria, L. 

 Colobognathus dolichocephalus, Cope. 

 Colobognathus brachycephalus, Cope. 

 Colobognathus hoffmannii, Peters. 

 Colobognathus yiasalis, Cope. 



A number of species, chiefly batrachians, have been sent to the Smithsonian 

 Institution by C. N. Riotte, which are of considerable interest. In addition to 

 the collections sent to the United States, others have been sent to Europe, and 



Colosteus rhodogaster, Cope. 

 Ninia atrata, Hallow. 

 Ninia sebse, D. B. : maculata, Pet. 

 Tantilla melanocephala, L. 

 Rhadinsea serperaster, Cope. 

 Conophis lineatus, Dum. Bibr. 

 Liophis epinephelus, Cope. 

 Herpetodryas carinatus, L. 

 Drymobius margaritiferus, Schl. 

 Dipsas gemmistratus, Cope. 

 Thrasops mexicanus, D. B. 

 Dryiophis brevirostris, Cope- 

 Pelamis bicolor, Daud. 

 Elaps multifasciatus, Jan. 

 Elaps ornatissimus, Jan. 

 Elaps nigrocinctus, Gird. 

 Bothriechis affinis, Boc. 

 Crotalus durissus, L. 



