160 U.S. NATIONAL MUSEUM BULLETIN 2 88 



the jaw. A distinct row of tubercles from behind the eye, above the 

 tympanum to above the axilla. Another row beginning above the 

 axilla and extending posteriorly to between the sacrum and coccyx, 

 thus forming a sort of dorsolateral fold; a few less well-developed 

 tubercles on upper surfaces of arm; skin of throat, chest, belly, and 

 lower femur uniformly and very finely granular; no skinfold across 

 chest; vocal sac not apparent. 



Dimensions. — Head and body, 46.6 mm.; head length, 17 mm.; 

 head width, 17.3 mm.; femur, 27.7 mm.; tibia, 28.9 mm.; foot, 36.7 

 mm.; hand, 16.4 mm. 



Color in alcohol. — A very dark frog. Entire dorsum, top of head, 

 and upper surfaces of limbs a chocolate brown; under magnification 

 this brown can be seen to be mottled faintly with an even darker 

 brown. Undersurfaces of chin, throat, and belly a pale brown with 

 the undersurfaces of the thighs a mottling of the dorsal and ventral 

 ground colors. Upper lip dark with four vertical bars of a lighter hue; 

 two of the bars enter the eye. 



Variation. — There are too few specimens available to make an 

 adequate study of variation, but from those that are available it 

 appears that C. juhrmanni is a rather uniform species. All the male 

 specimens are rather dark and rather rough, with fairly well-devel- 

 oped folds along the dorsolateral region. 



A large female (CNHM 82025, with the data "Colombia") seems 

 to represent this form. This frog, measuring 60.7 millimeters in head 

 and body length, was carrying eggs when captured. One of the eggs 

 still with this female contains an embryo with pigment and well- 

 developed eyes. There are 24 egg pockets in the skin on her back. 

 The pattern on the rear of her thighs is paler than in the examined 

 males of this form, but her short snout and the roughness on the top 

 of her head seem to indicate that this female should be identified as 

 juhrmanni rather than boulengeri or nicejori. 



Remarks. — The name "juhrmanni" has had a somewhat checkered 

 history. Peracca (1914, p. 108) described the frog in the genus Hyla. 

 Noble (1917, pp. 804, 805), surely without ever having seen a Hylo- 

 scirtus, assigned Cryptobatrachus boulengeri (which had been described 

 by Ruthven in 1916) to the genus Hyloscirtus, along with Hyla juhr- 

 manni of Peracca. Since we have now seen recent material of the 

 adults of both sexes and the young of Hyloscirtus, as well as all three 

 species of Cryptobatrachus, we can categorically state that the two 

 genera are distinct and that Hyloscirtus has nothing to do with the 

 problem under discussion. Ruthven (1922, p. 551) took issue with 

 Noble about assigning Cryptobatrachus to Hyloscirtus but he assigned 

 his own species, boulengeri, to the synonymy of juhrmanni. Barbour 



