bakbour: new reptiles and amphibians. 325 



Hylella it cannot be considered a monophyletic genus. The occurrence of three 

 species of tree-toads lacking vomerine teeth, on the comparatively small island 

 of Jobi, is rather remarkable. 



Hyla ouwensii, sp. nov. 



Head short ; snout squarish ; loreal region rather concave ; tympanum ex- 

 tremely small, about one-fifth diameter of eye ; the tibio-tarsal articulation reaches 

 a considerable distance beyond the snout. Fingers two-thirds webbed, toes three- 

 fourths webbed. Skin of back rough but without enlarged tubercles, skin on 

 belly with very many small tubercles ; these are largest and most abundant about 

 the anal region, whence the series extends out on to the inner sides of the thighs 

 for about half their length. Upper parts of head, body, thighs, shins, feet, and 

 arms of a grayish ground color vermiculated and blotched with blue, in alcohol; 

 green, in life ; more ashy gray shows on the limbs than on the back. Throat 

 white, belly and lower sides of hind limbs yellowish. 



Allied to Hyla (Hylella) nigromaculata (Meyer). 



Type. — No. 2434, Mus. Comp. Zobl., a single specimen, about an inch and 

 a half long, taken at Pom, north coast of Jobi (Japen) Island, Geelvink Bay, 

 Dutch Papua, February, 1907. T. Barbour, collector. 



This species is named for Major P. A.. Ouwens, Curator of the Buitenzorg 

 Museum, Java, who gave me a most kind hospitality, much assistance, and infor- 

 mation. 



