210 V. S. NATIONAL MUSEUM BULLETIN 206 



Mathematical analysis (in percentage of the total length) : 



Color in alcohol. — Dorsal surfaces fawn color, with a sprinlding of 

 coarse black spots on the back; a heavy ocellated pattern on the sides, 

 the centers of the ocelli pale gray edged with black, and some other 

 irregular black lines running up onto the posterior part of the back; 

 arms and legs with brown, black-edged crossbars which fade out on 

 anterior and posterior surfaces of femur into irregular dark mottlings ; 

 a black-edged anal spot; ventral surfaces buff, with some pale brown 

 reticulations on the chin. External vocal sac blackish. 



Color in life. — Young examples brought from Manguinhos were 

 usually dull sage green above, with vinaceous or light maroon spots 

 in the areas which later bleached to pale gray when the frogs were 

 preserved. The following color notes were made on January 23, 

 1935, from a living specimen taken at Manguinhos: Dorsal color 

 olive-buff, marked with large olive, black-edged spots. Posterior 

 femur wood brown, with white spots on top of the femur. Chin and 

 anterior part of belly white with suffusions of sepia. Lower sides of 

 limbs and posterior part of belly ochraceous-orange. 



A young specimen from Teres6polis, taken in April 1935, had the 

 following coloration : Dorsal ground color drab, with numerous poppy- 

 red spots outlined with clove brown; sides pale olive-buff with smaU 

 black spots. Upper surface of legs and arms pale olive-buff with irreg- 

 ular sepia crossbands. Posterior femur pale drab. Chin and throat 

 pale olive-buff with small round olive spots. Belly and hind legs 

 drab below, skin of these parts translucent. Green bones are visible 

 through the flesh. Iris coppery, with many large black spots and lines 

 throughout. 



Variatio7is. — The bony development of the head is much greater in 

 some individuals than in others, as might be expected. A male, 

 USNM 52609, has head ridges which equal those of Aparasphenodon 

 brunoi in sharpness, although the short snout and the less concave 

 forehead prove that the specimen belongs to the species nigromaculata. 

 The webbing on fingers and toes is practically identical in all the 

 specimens, and there is not much variation in leg length, although the 

 heel of USNM 97675 reaches nearly to the anterior corner of eye. 



