60 [April, 



mottled with brown on the body and on the inferior and inner faces of the limbs ; 

 where are also visible minute white dots. Lower surface of body appears quite 

 black. A narrow white line from eye to arm. 

 Hab. Key West, Florida. 



Genus Chorophilus, Eaird. 



Smooth above, granulated beneath. Extremities of limbs simple, not dilated 

 at tip. Hands free; feet with a slight basal web, which is entirely wanting be- 

 tween the two outer toes. Tongue orbicular ; emarginate behind. Teeth pos- 

 terior to the inner nares. Tympanum distinct. Transverse apophyses of sacral 

 vertebrae dilated into triangular pallets. 



Distinguished from Acris by expansion of apophyses; from Litoria by the 

 emarginate tongue, less membrane of toes, and more posterior palatine teeth ; 

 from Hylodes in having a membrane at base of toes, &c. 



Type, Chorophilus nigritus, Baird, (Cystignathus nigritus, Holb.) 



Genus Heloccetes, Baird. 



Granulated almost everywhere above and below. Tongue nearly entire. Vo- 

 merine teeth between the nares. Tympanum distinct. Fingers and toes slightly 

 dilated or knobbed. Fingers free ; toes webbed to bases of phalanges ; a slight 

 membrane at base of outer toes. Transverse apophyses of sacral vertebras ex- 

 panded at ends. 



Differs from Hylodes and Acris in membrane of toes, and dilatation of sacral 

 apophyses ; from Hyla in slight web and disks ; from Chorophilus in more an- 

 terior position of vomerine teeth, &c. 



3. Heloccetes feriarum, Baird. Body stout, squat. Head broad. Femur and 

 tibia and hind foot about equal, and half the length of the body. Above dark or 

 fawn, with three nearly parallel stripes down the back, the central widening, 

 but scarcely bifurcate behind, and commencing behind a triangular spot between 

 the eyes. A similar dark vitta on sides of head and body, with a white line 

 along edge of the jaw. Body about one inch long. 



Hab. Carlisle, Penna. 



4. Heloccetes triseriatus. Baird. Body rather slender ; head narrow. Femur 

 less than tibia, which is about two-thirds length of body, and shorter than hind 

 foot. Light bluish ash above, with a "Hark dorsal stripe commencing at the snout, 

 and not interrupted between the eyes; bifurcating about the middle of the 

 trunk ; a stripe on each side of this, and another on sides of head and body, 

 making five distinct stripes anteriorly; lateral stripe with white line below. 

 Body about an inch in length. 



Syn. Hyla triseriata, Max. Prinz von Wied. Reise 1, (1839,) 249. 

 Hab. Michigan, Illinois, Wisconsin and the upper Missouri. 



5. Heloccetes clar/cii, Baird. Snout acute, projecting. Extremities somewhat 

 dilated. Tibia half the distance between eye and anus. Foot but little longer, 

 not nearly half the length of body. Above grayish brown or ash, with distinct 

 large circular blotches. A dark band from snout through eye and tympanum 

 down the sides, and a whitish line on the side of jaw. Size about one inch long. 



Hab. Galveston and Indianola, Texas. 



6. Hyla richardii, Baird. Above uniform grass green ; smooth; beneath 

 white. Tibia considerably less than half the length of body. Hind foot less 

 than arm from elbow. Less than one inch in length. 



Hab. Cambridge, Mass. 



7. Hyla andersonii, Baird. Skin smooth but wrinkled ; arm from elbow 

 longer than hind foot. Above dull olive brown, as are all the exposed surfaces 

 of the limbs when the animal is couchant ; all the concealed surfaces, especially 

 those in contact with each other, are thickly sprinkled with circular, yellowish 

 white spots on a pale brown ground, seen also on the armpits and sides of body 

 behind. A post-ocular dark vitta extended down the sides (where its lower 



