322 U.S. NATIONAL MUSEUM BULLETIN 2 88 



ECUADOR: Macuma; Moruna-Santiago, EPN 2582; Napo-Pastaza, Rio Cor- 

 rientes, EPN 133G-9, 3811-28; Montalvo, EPN 1344; Rio Pucayacu, EPN 

 1347-8; Rio Rutuno, EPN 1393; cabeceras del Rio Capahuari, EPN 1430; 

 Pindo, EPN 1522; "Region de Puyo," EPN 1679-80; Rio Pindo, EPN 

 2502-4; mas abajo de Montalvo, EPN 4039; Rio Pastaza, NR collection 

 (type of Hyla depressa). 



PERU: Ayacucho, Sivia on Rio Apurimac, CNHM 39853; Huancahamba, BM 

 1911.12.13.63. 



VENEZUELA: Cerro Ya-Pacana, USNM 83947. 



Osteocephalus leprieuri (Dumeril and Bibron) 



Plate 39a-c 



1841. Hyla leprieuri Dumeril and Bibron, p. 553 (type locality, French Guiana, 

 Cayanne).— Gunther, 1958, p. 101.— Boulenger, 1882a, p. 361 — 

 Lidth, 1904, p. 94.— Baumann, 1912, p. 163.— Beebe, 1919, p. 208 — 

 Nieden, 1923, p. 305. — Miranda-Ribeiro, 1926, p. 81. — Andersson, 

 1945, p. 73.— Rivero, 1961, p. 130. 



1867. Hypsiboas leprieuri. — Cope. 1867, p. 200. 



1874. Osteocephalus planiceps Cope, 1874b, p. 122 (type locality, Peru, Nauta). — 

 Goin, 1961, p. 13. 



1882. Hyla planiceps— boulenger, 1882a, p. 364.— Nieden, 1923, p. 306 — 

 Gorham, 1963, p. 22. 



1941. Hyla vilarsi Melin, p. 40 (type locality, Brazil, Taracua, Rio Vaup6s). — 

 Gorham 1963, p. 23. 



1961. Osteocephalus leprieuri. — Goin, 1961, p. 13. 



Diagnosis. — A medium-sized Osteocephalus with a moderately exos- 

 tosed skull and a relatively smooth dorsum. 



0. leprieuri may be distinguished from 0. orcesi and 0. taurinus by 

 having the dorsum smooth instead of sand-papery. 



Description. — MCZ 28042, from Vaupes, Colombia. Vomerine teeth 

 in two moderately heavy, transverse series, lying very close together 

 between the rather large, oblong choanae; tongue three-fourths as 

 wide as mouth opening, broadly cordiform, its posterior border slightly 

 free and very shallowly notched. Snout neither large nor prominent, 

 somewhat rounded when viewed from above, rather pointed in profile, 

 the upper jaw extending considerably beyond lower; nostrils decidedly 

 more lateral than superior, considerably projecting, their distance 

 from end of snout about two-fifths that from eye, separated from each 

 other by an interval equal to about two-thirds their distance from eye. 

 Canthus rostralis very strongly defined and practically straight; loreal 

 region concave and oblique, the upper lip flaring out moderately below 

 it. Eye neither large nor prominent, its diameter equal to its distance 

 from nostril; palpebral membrane not reticulate; interorbital distance 

 about equal to width of upper eyelid, which is relatively wide and one- 

 third again as great as the distance between nostrils. Tympanum very 



