370 U.S. NATIONAL MUSEUM BULLETIN 288 



of eye above tympanum, ending on shoulder; no skinfold across chest; 

 no ventral disk; probably a median external vocal sac in the male. 



Dimensions. — Head and body, 22 mm.; head length, 7.5 mm.; head 

 width, 7.5 mm.; femur, 9 mm.; tibia, 10 mm.; foot, 8.5 mm.; hand, 

 5.5 mm. 



Color in alcohol. — Dorsum sepia, with a clove brown area border- 

 ing the dorsolateral ridges above; venter immaculate drab gray except 

 for a large brown mark beginning behind tympanum, covering side 

 behind axilla halfway to groin, and turning forwards along side of 

 belly to and just below axilla; groin with a smaller clove brown dot 

 on the pale drab inguinal glands; a short brown bar across posterior 

 part of belly level with groin; proximal half of lower femur pale 

 drab, distal half clove brown, broken with light areas near the knees; 

 lower tibia with seven or eight small dark brown spots alternating 

 on either side; posterior surface of femur seal brown, with an anterior 

 prolongation of the distal brown femoral spot nearly reaching the 

 anal region; upper lip pale drab; can thus, tympanum, and tip of 

 snout seal brown. 



Remarks. — All the specimens listed here belong in the first column 

 of Dunn's (1949, p. 5) table headed "vomerine teeth present" under 

 his subgroup having "perezi" warts, i.e., with the warts more or 

 less uniformly scattered over the upper surface and not arranged 

 in connected linear rows as they are in his "plicijrons" style of warts. 

 Furthermore, a very distinct wart appears on the tip of the snout 

 in the nine adults, and it is almost equally developed in all of them. 

 A small wart is present on the snouts of the 17 young specimens 

 from Santa Rita, Solimoens River, Brazil. All have a very definite 

 interocular ridge. 



The color of the snout is sometimes whitish, with a tan canthal 

 line and with another line running diagonally from below the nostril 

 to the upper lip, as in BM 80.12.5.194a. In USNM 146954-6 and in 

 BM 1915.3.9.17 the snout is completely brown in front of the inter- 

 ocular ridge. In four others (USNM 127928 and BM 1900.11.27.45 

 from Peru, and BM 80.12.5.194b and 81.7.8.11 from Ecuador) the 

 snout is light just anterior to that ridge but it darkens toward the 

 tip. 



The largest specimen (BM 80.12.5.194a from Canelos, Ecuador) 

 has the following measurements, in millimeters: total length, 40; 

 head length, 13; head width, 13.5; femur, 16; tibia, 17.5; foot, 16; 

 hand, 11. Its adpressed heel reaches to the posterior corner of the 

 eye, as in the example described above. 



The collecting of specimens in Amazonas, Colombia (USNM 

 146954-6 from Puerto Narino and JRT 104 from Leticia), extends 

 the known range of this species considerably to the east of that 



