316 U.S. NATIONAL MUSEUM BULLETIN 2 88 



for the specimen became paler after sitting for a few minutes in a 

 glass jar than it had been when taken from the collecting bag. 



Remarks. — To our knowledge, nine specimens of this species have 

 been collected: the type, described by Peters in 1882; a male collected 

 by Dr. and Mrs. Dunn near Bogota on July 21, 1944; an adult male, 

 (CNHM 81916) from Boquer6n Gorge, Bogota; an adult female 

 (MLS 160) from Chipaque, Cundinamarca; an immature female 

 (CNHM 54776) from El Tambo in Cauca; an adult female (CJG 

 2299) collected by Alice Hunter in Boquer6n Gorge, Bogota, January 

 8, 1962; and two adult females and a juvenile (MZUM 123946-8) 

 collected by Hno. Niceforo Maria in the vicinity of Bogota. 



We have seen seven of the nine known specimens. As Dunn suspected, 

 the color pattern variation seems to be a result of sexual dimorphism. 

 All of the adult females we have seen are grayish yellow with tiny, 

 scattered black spots above, just as was described for the type. 

 On the other hand, the one male specimen (CNHM 81916, 46 mm.) 

 is generally darker and has the dorsal pigment concentrated into 

 larger, rounded black spots that are scattered over the upper surface 

 just as Dr. Dunn described for the male he collected. Furthermore, 

 this male specimen has a round dark spot under the chin as described 

 by Dr. Dunn for his male. Apparently these differences are purely 

 sexual. The immature female (CNHM 54776, 33.6 mm.) is pigmented 

 just as the adult females. 



The structure of the girdle may well imply a relationship with 

 Cryptobatrachus, but whether or not the eggs are carried on the 

 back is unknown. The only specimen with known ecological data is 

 the one collected by Dr. Dunn; it was taken from a bromeliad that 

 had grown to about four feet. Dr. Dunn suggested that it might 

 breed in bromeliads and that its tadpoles are modified for that habitat. 

 One adult female (MLS 160) contains what are apparently mature 

 eggs ready for desposition, but no pigment is discernible on them. 

 If the eggs are unpigmented when desposited it would suggest they 

 are deposited in a secluded site. Further studies on the life history 

 of this species may throw further light upon its relationships. 



The conspicuousness of the tympanum is apparently partly a 

 function of size, for it is not in evidence in the immature female but 

 is discernible in both adult specimens, although it certainly is not 

 as conspicuous as it is in Cryptobatrachus. 



Specimens Examined 



COLOMBIA 



Cauca: El Tambo, CNHM 54776. 



Cundinamarca: Boqueron Gorge, Bogota, CNHM 81916, CJG 2299; vicinity 

 of Bogota, MZUM 123946-8; Chipaque, MLS 160. 



