FROGS OF COLOMBIA — COCHRAN AND GOLN 313 



Color in alcohol. — Ground color very pale gray above and below. 

 The pattern consists of three elements: the glandular folds above the 

 shoulders, which are black; numerous, widely scattered, dark, pencil- 

 like dots on the dorsal surface; and pale dorsolateral stripes. There are 

 three dorsal dots on each loreal region, three on top of the head, about 

 fifteen scattered over the back, two on the dorsal surface of each arm, 

 three on the dorsal surface of each thigh, four on the left shank and 

 three on the right shank, and two on the left foot and one on the right 

 foot. Each pale, narrow, dorsolateral light stripe originates on the tip 

 of the snout and passes posteriorly above the eye and tympanum and 

 terminates just anterior to the groin. These stripes are very indistinct 

 on this specimen because of its pale ground color. 



Variation: — Among the six paratypes, three individuals (MCZ 

 28053-4 and 28074) are pale gray dorsally, as is the type. The other 

 three specimens are much darker dorsally, although close inspection 

 shows that the same basic dorsal pattern is present in all of the speci- 

 mens. This variation in intensity of dorsal color probably is not due to 

 preservation alone, for the six specimens in the series (MCZ 28052-7) 

 were all collected and preserved by the same collector at the same 

 time and place. In all except one of the dark specimens (MCZ 28056) 

 are apparent pale dorsolateral stripes that originate at the tip of the 

 snout and pass above the eye and tympanum and terminate in the 

 region of the groin. In the pale specimens these stripes are hardly ap- 

 parent except where they pass through the dark glandular, dorsolateral 

 fold. In the darker specimens, however, this light stripe stands out 

 distinctly against the dark background. In head and body length, the 

 specimens range from 42.5 millimeters (the type) down to 27.8 milli- 

 meters in an immature individual. 



Remarks.- — We dedicate this species to Dr. Horton H. Hobbs, Jr., 

 of the U.S. National Museum. 



Genus Hyloscirtus Peters 



1882. Hylonomus Peters, p. 107 (type species, Hylonomus bogotensis Peters 

 (preoccupied by Hylonomus Dawson, 1860 [Amphibia, Stegocephalia]) . 



1882. Hyloscirtus Peters, p. 127, type species, Hylonomus bogotensis Peters 

 (substitute name for Hylonomus, preoccupied). 



Diagnosis. — No tympanum or external evidence of ear; rounded 

 sacral diapophyses; a median subgular vocal pouch in male; vomerine 

 teeth behind level of choanae. Life history unknown. 



Hyloscirtus bogotensis (Peters) 



Figure 37 

 1882. Hylonomus bogotensis Peters, p. 107 (type locality, Bogota, Colombia). 



