250 'U. S. NATIONAL MUSEUM BULLETIN 206 



behind the comer of the mouth; most of the tubercles on the sides 

 Hght, a pale diagonal white stripe just in front of groin; three wide, 

 dark, r( :tangular spots separated by white interspaces on upper 

 surface ^ f femur; tibia with simUar but less distinct dark spots; 

 anterior and posterior surfaces of femur with small dark dots which 

 partly anastomose to form slight reticulations; upper surfaces of arms 

 and feet drab with confused darker marblings; ventral surface pale 

 buff, immaculate except for a few gray spots across the throat, con- 

 centrating into a short dark longitudinal stripe on the center of the 

 throat. 



Color in life. — Four examples, USNM 97420-3, served as a basis for 

 color notes. Middorsal area and head bister to olive, posteriorly dark- 

 ened. Lateral regions Indian purple with lighter spots of olive-buff. 

 Ventral parts white with a cloudy mottling on the throat. Limbs 

 broccoli brown barred with clove brown. Iris gold, pupil black. 

 Spines on thumb black. A prominent white glandular stripe behind 

 ear. The smallest one is more greenish, with olive-green above, lower 

 surface of legs pale olive-yellow, and very pale mottling over entire 

 undersurface. 



Variations . — This species is subject to a great deal of variation in 

 many of the characters which as a rule show some stability. In the 

 matter of vomerine teeth, for instance, all trace of any may be lacking, 

 or there may be a well-defined but toothless ridge curving inwards 

 from the anterior borders of the choanae, or there may be a small but 

 distinct patch of four or five teeth at the inner end of this ridge be- 

 tween the choanae. The dermal fringes on the toes and fingers may 

 be present and developed to a high degree, or they may exist only as a 

 ridge along the sides of the digits, or they may be entirely lacking. 

 The third toe varies in relation to the fourth, its tip sometimes extend- 

 ing to the base of the penultimate phalanx of the fourth, sometimes 

 only half-way up on the antepenultimate. A dorsolateral fold may 

 be distinctly present, but is often very slight and may be lacking. 

 The interorbital diameter, usually greater than the width of the upper 

 eyelid, is sometimes equal to it. The nostril in half the specimens is 

 midway between eye and tip of snout; in the rest about two-thirds the 

 distance from eye to snout. The snout may be rounded, but usually 

 has four distinct slants, that from eye to nostril on each side and a very 

 wide obtuse angle at the tip. The head length averages 37 percent of 

 the total length (range, 32 to 42) and the tibia about 49 percent (range, 

 42 to 55). The adpressed heel reaches to the anterior corner of the 

 eye, and sometimes nearly to the nostril, while the hind leg measured 

 from groin to tip of toe is about VA times the head and body length. 

 The skin is fairly smooth on the dorsum, but often with small pointed 

 tubercles on the sides. The warty appearance is still further increased 



