126 U. S. NATIONAL MUSEUM BULLETIN 206 



Dimensions. — Head and body 20 mm.; head length 6.5 mm., width 

 6 mm.; femm* 8 mm.; tibia 9.5 mm.; foot 7.5 mm.;*hand 5.5 mm. 



Color in alcohol. — Dorsal ground color light pinkish vinaceous; a 

 pair of fine drab lines beginning at the nostril, continuing parallel to 

 the postorbital region, where they slightly diverge, breaking up into 

 dots and becoming lighter and diverging stUl more at the center of the 

 back, where they finally fade out; a few drab dots in short, irregular 

 longitudinal series on the sacral region near the midline; a drab 

 dorsolateral line beginning at the tip of the snout, continuing above the 

 tympanum and to the anus, extremely sharp and clean cut on its 

 upper border for its entire extent, and becoming a wide cinereous 

 lateral area below, which merges into the uniform, immaculate, pearl- 

 gi-ay ventral region; entire femur immaculate; upper part of tibia and 

 forearm colored like the back, with irregularly scattered drab dots not 

 arranged in crossbars; feet and hands pale, immaculate; upper lip 

 border pale. 



Variations. — The three other specimens from Lassance are also 

 males and do not show much variation from the one described, except 

 that one has the dark dorsal lines much more distinct, while at the 

 same time showing a secondary pair of lines, mostly broken up into 

 dots, which emanates from the upper eyelid and parallels the dark 

 dorsolateral line nearly to the anus. The remaining two specimens 

 show more or less irregular, very light dots in this region, the pattern 

 being scarcely visible. The dorsal ground color becomes much lighter 

 next to the dark dorsolateral stripe, so that the latter appears to be 

 bounded above by a nearly white stripe. The heel in these three 

 Lassance specimens reaches to the posterior corner of the eye. 



A fine pair from Bolivia, USNM 101442-3, are identical in structure 

 but slightly larger, the male measuring 22 mm. and the female 26 mm. 

 in total length. The female has a trace of four dorsal dark lines, 

 represented only by widely spaced sepia spots. The male has the 

 central pair of dorsal lines quite plainly marked, but the outer pair is 

 nearly invisible. In neither of these two specimens do the liaes 

 diverge, nor are there separate sacral lines or spots. 



Remarks. — H. W. Parker has compared two of the Lassance speci- 

 mens, USNM 98130-1, with the types of H. nana in the British Mu- 

 seum (Natural History) . He beheves them to be conspecific. 



Specimens of H. nana were collected at Lassance as they sang at 

 night on the aquatic plants growuig in the shallow waters of the lagda 

 in the center of a wide grassy plain near the foothiUs of the Serra do 

 Cabral. Unfortunately no females or eggs were seen. The adult 

 males when alive are yellowish. They are usually marked like H. 

 goughi and like some individuals of H. decipiens, but can be told 



