134 U. S. NATIONAL MUSEUM BULLETIN 206 



considerably; when hind legs are bent at right angles to body, heels 

 greatly overlap. Skin of upper parts smooth; a very indistinct 

 glandular ridge above tympanum; skin of throat and chest smooth, 

 of belly coarsely granular, of lower femur less coarsely granular. A 

 distinct skinfold in front of the arm insertion on the sides of the chest. 

 A pair of lateral external vocal sacs. 



Dimensions.- — Head and body 27 mm.; head length 9.5 mm., width 

 9 mm.; femur 12.5 mm.; tibia 15.5 mm.; foot 11.5 mm.; hand 8 mm. 



Color in alcohol. — Ground color of upper parts pale tawny-olive to 

 drab ; a narrow sepia line beginning on the snout, continuing along the 

 canthal region, over the tympanum and beyond the shoulder, the 

 area between this and the more dorsal dark line cream-buff; the tym- 

 panum and adjoining skin of shoulder and upper arm also cream-buff; 

 femur with indistinct dark spots anteriorly, irregularly suffused with 

 dark posteriorly; tarsus and feet Mdthout definite color markings; 

 ventral surface immaculate olive-buff. 



Color in life. — From a painting by Sandig of a young frog, USNM 

 96138, taken from bromeliads at Manguinhos in April 1925. Dorsal 

 ground color bright tawny-olive with a yellowish tinge on the limbs; 

 a sepia stripe along can thus rostralis; a sepia crossbar between the 

 eyes, the dark area just behind it fading gradually into the dorsal 

 tone; a dark lateral stripe bordered above by a wide light dorsolateral 

 stripe of the ground color, which in turn is bordered above by a 

 longitudinal series of elongate sepia spots set off by minute lemon- 

 yellow dots. Upper part of femur with indistinct wide drab spots; 

 posterior surface of femur drab; upper surface of tibia and forearm 

 with wide drab crossbars, feet and hands with faint darker mottlings, 

 webs and disks white. Ventral surface immaculate pearl gray, the 

 belly slightly suffused with pinkish and the lower limb surfaces with 

 olive. Iris orange-rufous, the black pupil transversely elliptic. 



Variations. — The examples of this form collected near the city of 

 Rio de Janeiro show no great structural variation, but the dorsolateral 

 dark spots are a little more completely fused into a more or less con- 

 tinuous broad dark stripe, with a rather conspicuous wide light stripe 

 followed by the dark lateral stripe below it, while the triangular in- 

 terorbital patch is seldom complete but is represented by three dark spots, 

 one for each angle of the triangle. Occasionally a very pale individual 

 like the one described is found with only a dark line along canthus 

 and above ear, although most specimens are heavily patterned. The 

 sharp-pointed broad head and the extremely narrow eyelids shielding 

 prominent eyes make it possible to recognize the frog without the 

 distinctive color pattern. 



Remarks. — Dr. A. Lutz noted that frogs of this species were formerly 

 found on bromeliads in mango trees near the Instituto Butantan. The 



