496 U.S. NATIONAL MUSEUM BULLETIN 2 88 



lip projects well behind the mouth as a fleshy fold which is dis- 

 tinctly scalloped along the edge. The largest specimen has a total 

 length of 38 millimeters and a tail length of 27 millimeters, while 

 the smallest has a total length of 20 millimeters and a tail length of 

 14.5 millimeters. Dr. Medem informs us that these tadpoles were 

 bright red in life. 



„ Specimens Examined 



COLOMBIA r 



Magdalena: San Lorenzo, MZUM 47785 (holotype); Finca La Granja, 



road to San Lorenzo, 2,300-2,700 m., USNM 150886-91, 151068. 



Family CENTROLENIDAE 



The members of this family may be characterized as follows: 

 procoelous; arciferal pectoral girdle; astragalus and calcaneum 

 fused into a single element; intercalary cartilages between penultimate 

 and ultimate phalanges; terminal phalanges T-shaped; sacral diapoph- 

 yses dilated; omosternum absent; sternum small and cartilaginous. 

 The frogs in this family differ from all other South American 

 frogs except Psudidae and Hylidae by the presence of intercalary 

 cartilages. From both of these they differ in having the terminal 

 phalanges T-shaped rather than claw-shaped. 



Key to Colombian Genera of Centrolenidae 



a 1 . Size large (77 mm., maximum head-and-body length) and build massive, 

 with the digital disk of third finger large enough to cover eye. Male with 

 an exceedingly well-developed humeral spine, the tip of which fits into an 

 antrum in the enlarged forearm Centrolene 



a 2 . Size small (about 35 mm., maximum head-and-body length) and build delicate, 

 with the eye larger than the digital disk of third finger. Humeral spine 

 in male varies in different species from impalpable to protruding but there 

 is no antrum in the forearm to receive the tip Centrolenella 



Genus Centrolene Jiminez de la Espada 



1872. Centrolene Jiminez de la Espada, p. 87 (type species, Centrolene geckoideum 

 Espada) . 



Generic diagnosis. — Procoelous; arciferal pectoral girdle; disk- 

 like intercalary cartilages present between ultimate and penultimate 

 phalanges; terminal phalanges T-shaped. 



This genus is readily distinguished from all hylid genera by the 

 presence of T-shaped terminal phalanges. The large size and the large 

 disks on fingers serve to differentiate it from Centrolenella. The single 

 species of this genus is kown only from Colombia and Ecuador. 



Centrolene geckoideum Jiminez de la Espada 



Plate 67g 

 1872. Centrolene geckoideum Jiminez de la Espada, p. 87 (type locality, Rio 



