650 GEOLOGICAL SURVEY OF NEW JERSEY. 



" Not as abundant as some others of the * frog ' family. Useful 

 as a mosquito killer." To be considered as only a variety of the 

 foregoing species, R. clamata. 

 R. catesbiana, Shaw [pipieris, Auct.) Bull Frog. 



Greenish, of various shades, with numerous small, indistinct, 

 darker spots ; head usually bright pale green ; glandular folds 

 not as marked as in preceding. Size large, sometimes over 12 

 inches. 



"Abundant wherever there is sufficient quiet water to warrant 

 the growth of water lilies. Eagerly sought for by epicures." 



R. silvatica, Le C. {cantabrigensis, Bd.) Wood Frog. 



Reddish brown ; a dark band on each side of head through 

 eye ; size small ; scarcely aquatic. 



" This handsome frog does not appear to be as numerous as its 

 predecessors. It is found wholly in moist spots in timber land, 

 where it feeds upon the numerous insects found among dead 

 leaves." R. cantibrigensis is a distinct variety. 



Family SCAPHIOPIDiE. 



Spade Foots. 



SCAPHIOPUS, Holbr. 



S. holbrookii, Harl. {solUarius, Holbr.) Solitary (or Hermit) Spade 

 Foot. 

 Heel bears a sharp-edged spur; color olive brown; a pale 

 yellow streak on each side ; burrows in the ground. 



" This little frog is not abundant, and is generally met with, 

 when found, in the southern counties of the State." 



Family HYLIDiE. 



Tree-toads. 



HYLA, Laur. 

 H. versicolor, Le C, Common Tree-toad. Green Tree-toad, &c. 



Small-sized arboreal frogs, with toes expanded into disks and 

 noted for their shrill voices. The disks are round, well devel- 



