474 U.S. NATIONAL MUSEUM BULLETIN 2 88 



axillary region nearly equal to greatest width of head. When hind 

 leg is adpressed, heel reaches posterior border of eye; when limbs are 

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

 at right angles to body, heels overlap. Skin of upper parts coarsely 

 glandular, with small pustules along edge of upper eyelids, on dorso- 

 lateral region, and especially on the sacrum; venter smooth; a distinct 

 glandular ridge from posterior corner of eye forking above tympanum, 

 its lower branch ending above corner of mouth, its upper branch 

 continuing as a pustular interrupted lateral line; a faint skinfold 

 across chest; no ventral disk; small external lateral vocal sacs and a 

 pair of thunb spines in the male. 



Dimensions. — Head and body, 46.5 mm.; head length, 15.5 mm.; 

 head width, 16 mm.; femur, 19.5 mm.; tibia, 23 mm.; foot, 26 mm.; 

 hand, 12 mm. 



Color in alcohol.— Dorsum slate gray, lightening to olive gray 

 posteriorly and on limbs; a slate black triangle between the eyes, its 

 apex pointed backwards; a slate chevron between the shoulders, and 

 short indistinct slate stripes following the lines of glandules on back; 

 femur with four short black crossbars, continued across tibia and 

 becoming fainter on outside of foot; similar but paler bars on forearm; 

 posterior femur pale drab gray with short black spots arranged 

 longitudinally on both sides of a median light postfemoral stripe; 

 sides of body smoke gray, lightening to olive buff towards the belly; 

 sides of head smoke gray, with three or four large diagonal black 

 spots from eye and loreal region to edge of lip; venter pinkish buff, 

 immaculate except for some gray spots around lower lip borders, and 

 gray suffusions on throat (of male). 



Remarks. — Metamorphosis was complete in a froglet (one of 19 

 specimens collected by the late Dr. E. R. Dunn at Villavicencio in 

 Meta) only 11.5 millimeters long. The yellow lateral glands are not 

 yet noticeable at so young an age but they are very distinct in young 

 males that measure 29 millimeters. 



In comparing critical measurements of 62 specimens of L. podi- 

 cipinus petersi from the northern countries of South America with 19 

 specimens of the nominate form from Bobore, Bolivia, and Pastorca, 

 Paraguay, the tibia in the former group was found to be significantly 

 longer proportionately than in the latter group. The foot of L. podi- 

 cipinus petersii also was longer, although the gap between the groups 

 was not great in this respect. 



The largest male of L. podicipinus petersi measured 63.5 milli- 

 meters and the largest female in that group measured 62.5 milli- 

 meters, while the largest male of L. podicipinus podicipinus measured 

 38.5 millimeters and the largest female 43 millimeters. 



The longer femur mentioned by Rivero (1961, p. 48) as characteristic 



