64 U. S. NATIONAL MUSEUM BULLETIN 2 06 



area; an oval, inner metatarsal tubercle and an extremely small, 

 wartlike outer one; a narrow but well-marked glandular line on inner 

 side of tarsus; no dermal appendage on heel; body heavily built, in 

 postaxUlary region slightly less than greatest width of head ; when hind 

 leg is adpressed, heel reaches to anterior comer of eye; when limbs are 

 laid along sides, knee and elbow just touch; when hind legs are bent at 

 right angles to the body, heels slightly overlap. Skin of upper parts 

 thick and finely shagreened, with small pustules on posterior part of 

 back and larger ones on the dorsolateral region, where two or three 

 heavy skinfolds occur; a wide, low glandular ridge encircling upper 

 part of tympanum, with numerous heavy pustules around lower border 

 of ear; skin of throat rather coarsely granular, that of chest less 

 distinctly so, and that of abdomen and lower thighs heavily granular; 

 a heavy skinfold across chest, and another on throat. (Two external 

 lateral vocal sacs and a horny dark patch on the thumb in the male.) 



Dimensions. — Head and body 87 mm.; head length 25 mm., width 

 29 mm. ; femur 37.5 mm. ; tibia 39 mm. ; foot 34.5 mm. ; hand 27.5 mm. 



Mathematical analysis (in percentage of the total length) : 



34. 8 37. 8 58. 4 53. 6 44. 5 34. 7 



Color in alcohol.- — Bod}^ color ecru-drab; an elongate, rectangular 

 seal-brown dorsal marking extending anteriorly between the eyes and 

 onto the eyelids, then backwards to the sacral region where its clove- 

 brown borders fade out and become rather irregular; a wide, clove- 

 brown lateral stripe beginning at the posterior corners of the eyes, 

 widening behind the tympanum, and breaking up behind the axilla 

 into a number of large spots; legs and arms with wide sepia crossbars 

 edged with a darker brown and separated by narrow drab areas; a 

 dark anal patch, light-bordered anteriorly; lower surfaces wood brown, 

 paler on chest, with numerous fine drab reticulations on abdomen 

 and throat; sides and end of snout slightly suffused with olive. 



Variations.- — Another individual, USNM 98536, from the same 

 spot as the described specimen, apparently a female, is practically 

 identical with it except in having a slightly smaller tympanum. 



Two males, USNM 28926 and 28927 from Lower Amazonia, are much 

 smaller than either of the two females from Piraporinha, as the largest 

 male, with fully extended lateral vocal sacs and a brown horny growth 



