THE UNIVERSITY OF KANSAS SCIENCE BULLETIN Vol. XXXIII, Pt. I] April 20, 1949 [No. 4 Costa Rican Frogs of the Genera Centrolene and Centrolenella BY Edward H. Taylor Abstract. — Four species belonging to the genera Centrolene and Centrole-nella have been recognized in the Fauna of Costa Rica. These are Centrolene ■prosohlepon (Boettger), Centrolenella pulveratum (Peters), Centrolenella valerioi (Dunn), Centrolenella fleischmanni Boettger. Four forms are de-scribed as new in the genus Centrolenella. These are C. spinosa, C. granulosa, C. albomaculata and C. colymbiphyllum, all from Costa Rica. Twenty-five specimens of small, green, hylid frogs taken in Costa^ Rica in the summer of 1947, resolve themselves into a group of species, one of which is referable to the genus Centrolene, since a humeral protuberance is present, and the others to the genus Cen-trolenella in which the protuberance or hook is absent. One of the species possesses a rudiment of a pollex with a sharp spine usually penetrating the free tip. While I am inclined to regard this develop-ment as worthy of generic designation, I am for the present referring the species to Centrolenella pending further research in the matter. Three species have already been described from Costa Rica. These are Hyla prosoblepon Boettger, in 1892, from Plantage Cairo (La Junta) near Limon, Atlantic side of Costa Rica; Carl Fleisch-mann collector; Hylella fleischmanni Boettger, in 1893, from San Jose, Costa Rica, Carl Fleischmann collector; and Centrolene valerioi Dunn, in 1931, from La Palma, Costa Rica, Manuel Valerio and E. R. Dunn collectors. A fourth species has been reported in Costa Rica. This is Hyla pulverata Peters, described in 1873, from Chiri-qui, Panama, H. Ribbe, collector. The present designations of the four species occurring in Costa Rica are: Centrolene proseblepon 17—3659 (257)
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