304 U.S. NATIONAL MUSEUM BULLETIN 288 



Life history notes. — The University of Florida specimens were col- 

 lected while they were calling along the edge of a wet meadow. Two 

 of the four individuals taken were collected from vegetation growing 

 in water along the margin of a stream that bordered the meadow. 

 The other two were collected while they were calling in the meadow 

 proper. 



The voice is a loud delibrate cre-e-e-e-e-e-p, ere-e-e-e-e-e-p and very 

 similar to that of H. leucophyllata. 



Remarks.' — Thanks to the kindness of Dr. Alf G. Johnels, we were 

 able to examine the four specimens in the type series and compare 

 them directly with the four fresh specimens from Leticia in the 

 University of Florida collection. 



The only appreciable difference between the two series is that of 

 size. The head-body length of the type series ranges from 35.4 to 

 36.7 millimeters while that of the specimens from Leticia ranges from 

 22.7 to 26.3 millimeters. Whether this variation is due entirely to 

 sexual difference (the Leticia specimens are all males, the types all 

 females) or whether it may be due in part to geographic variation 

 cannot now be determined. Two specimens in the type series have not 

 faded as much as the others, and in these the same facial mask can 

 be seen exactly as it is in the Leticia specimens. In structural characters 

 such as teeth, size of tympanum, shape of head, tongue, and amount 

 of webbing, no significant differences between the two series can be 

 discerned. 



Specimens Examined 

 COLOMBIA 



Amazon as: Leticia, UF 8522-3, 8524 (2). 

 ECUADOR: Rfo Pastaza, NR (4 specimens, types of H. membranacea) . 



Hyla oliveae, new species 



Figure 34 



Holotype. — UF 8555, from Leticia, Amazonas, Colombia, collected 

 by E. Ross Allen and James N. Layne on February 23, 1956. 



Diagnosis. — A Hyla of the leucophyllata group with well-developed 

 patagia, pectoral glands, and vomerine teeth. The brown dorsum with 

 gold spots in life seems to be unique. 



This new species perhaps is most similar to H. membranacea, from 

 which it differs in having the bright gold spots on the dorsum, in 

 lacking dark lores and a dark postocular stripe, in having a more 

 rounded snout, and in voice. 



Description of holotype.— Vomerine teeth in two short, indistinct 

 series, lying close together between the small, rounded choanae; 

 tongue three-fourths as wide as mouth opening, very broadly cordi- 

 form, its posterior border free and very shallowly notched. Snout 



