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thighs coarsely granular; no dorso-lateral fold; a subgular vocal sac. Color 

 light green above, darkest on head; white below; bones green, the tibia show- 

 ing through the transparent under skin. Tip of snout to vent 27 min.; tip of 

 snout to posterior border of tympanum 8; width of head 10; arm 14; leg 38; 

 tibia 13. 



Variation. — Females lack the thumb-pad. In most specimens (63%) there 

 is a well-developed interocular stripe of yellow with dark edges. This is 

 correlated with sex for of the 28 specimens with thumb-pads only 6 had well- 

 developed stripes, and of 44 specimens over 25 mm. long without thumb-pads, 

 only 6 did not have a well-developed stripe. The specimens with thumb- 

 pads were 24-27 mm. long. A few had the pad represented by isolated black 

 cones. The largest specimens had no pads and reached a length of 29 mm. ; 

 the smallest one collected was 15 mm. long. 



Habits. — All the specimens were taken from the "wild pines" (Bromeliads) » 

 where the larger Hyla brunnea was also occasionally found. The natives 

 called the new form "Spring Chickens" reserving the name "Tree Toad" 

 for brunnea. 



Remarks. — This form differs from the Jamaican brunnea and 

 lichenata, the Haitian dominicensis and the Cuban septentrionalis 

 in not having the skin of the head adherent to the cranium, as 

 well as in the peculiar thumb-pad of the male, the weaker vomer- 

 ine teeth and less-developed webs. 



From the Haitian heilprini and pulchrilineata which have the 

 head-skin similarly free, it differs in color, in weaker vomerines, 

 in style of thumb-pad, and in weaker webbing. In the oblique 

 tympanum and the color it somewhat resembles heilprini. In 

 size, weaker vomerines, and less-extensive webbing it resembles 

 pulchrilineata. The male apparatus of heilprini is a dagger- 

 shaped prepollex, that of pulchrilineata is a flat horny pad (as in 

 septentrionalis, dominicensis and brunnea), while that of wilderi 

 is a very rugose affair. Pulchrilineata, too, has the chest and 

 throat coarsely granular, while the chest and throat of wilderi 

 are smooth. It is probably most closely related to pulchrilineata, 

 and runs neatly to that species in Nieden's key to the genus. 

 It is similar in proportions and in vomerine teeth to brunnea 

 and differs from it only slightly in extent of webbing, and this, 

 in connection with its delicate and youthful appearance and its 

 small size, led me to consider it the young of brunnea until I 

 noticed the thumb-pad of the male. The same opinion was held 

 by Barbour (I.e.), who says of brunnea: "The young of this 

 species show a peculiar dichromatic condition. They may be 

 generally dark in color, i.e. rather like the adults; or they may 

 be light yellow, almost transparent, amber-like, with a broad, 

 white-edged, golden metallic band between the eyes." These 

 light specimens, which came from Mandeville, belong to the 

 present species, and ten of them are in the collection of the 

 Museum of Comparative Zoology. 



