FROGS OF COLOMBIA — COCHRAN AND GOIN 347 



webbed at base, fourth finger considerably longer than second, reach- 

 ing to middle of disk of third which covers about one-third the tym- 

 panic area; no projecting rudiment of a pollex; no ulnar ridge. Toes 

 slightly more than one-half webbed, the web on fourth toe reaching 

 distal end of antepenultimate phalanx, third and fifth toes subequal, 

 disk of fourth toe covering about one-fourth to one-third the tympanic 

 area; a distinct oval inner and a smaller but equally distinct rounded 

 outer metatarsal tubercle; no tarsal ridge; no dermal appendage on 

 heel. Body moderately elongate, in postaxillary region a little nar- 

 rower than greatest width of head; when hind leg is adpressed, heel 

 reaches tip of snout; when limbs are laid along the side, knee and 

 elbow meet snugly; when hind legs are bent at right angles to body, 

 heels overlap greatly. No patagium. Skin of upper parts smooth, a 

 rather narrow glandular ridge encircling upper part of tympanum; 

 skin of throat and chest finely granular, that of belly and lower sur- 

 face of thigh uniformly and more coarsely granular; a distinct skinfold 

 across chest; adult male, vocal sac well developed. Skin of head not co- 

 ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 55.6 mm.; head length, 19.6 mm.; 

 head width, 20.8 mm.; femur, 25.6 mm.; tibia, 33 mm.; heel-to-toe, 

 40.2 mm.; hand, 16.8 mm. 



Color in alcohol. — Above, light gray with mottlings on the dorsum of 

 dark gray, top of thigh pale gray with pepper-like dark flecks, top of 

 shank pale gray with several indistinct dark gray crossbands. Loreal 

 region a little darker than top of head, a very distinct dark postocular 

 stripe runs posteriorly from the hind corner of eye, includes all of tym- 

 panum, and terminates above shoulder. This dark stripe is bordered 

 below by a very narrow, pale, light margin. Also, there is a light line 

 along the entire edge of the upper lip. Ventrally the specimen is very 

 pale cadaverish gray except under chin and throat where it is rather 

 heavily flecked with fuscous. 



Variation. — In S. phaeota the females are distinctly larger than the 

 males. Of two large females at hand, one (CNHM 54768) measures 69.2 

 millimeters in head-and-body length and the other (CJG 2250) 71.3 

 millimeters. The three largest males at hand (CJG 2251-53) measure 

 54.2, 55.3, and 55.6 millimeters in head-body length. 



In the fresh material at hand, the pattern is very much the same on 

 all specimens, differing only in intensity. A rather distinct pattern of 

 dorsal dark blotches and bands across the tops of the thighs and shanks 

 is evident in most of the specimens. In fresh material the dorsal 

 blotches are dark gray, on a light gray dorsal ground color. In all speci- 

 mens a light-bordered, dark, postocular stripe that includes the tym- 

 panum is conspicuous. In some, the dark blotches on the back and the 



