THE BATRACHIA OF NORTH AMERICA. 329 



about twenty or thirty beats. The noise can not be heard at a very 

 great distance. Like Hyla pic1{eringii, this species in confinement can 

 readily be made to produce its note by imitating it, either with the 

 voice or the clattering of two pebbles. It keeps on the high grass in 

 and around marshy i)laces, seldom if ever ascending trees or bushes. 

 When pursued it leaps with prodigious agility and hides under water. 



Acris gryllus gryllus Le C. 



Eana gryllus Le Coute, Ann. N. Y. Lye. i (1825), 282 ; Harlan, Journ. Ac. Nat. Sci. 



V, (1827), 317, and Med. and Phys. Res. (1835), 104 (copied). 

 Eana dorsalis Harl., Journ. Ac. Nat. Sci., Phila. v (1827), 317, and Med. and Phys. 



Res. (1835), 105 (Fig. on p. 72), (Florida.) 

 JUylodes gryllus Holbrooli, N. Amer. Herp., 1st ed., ii (1838), 75, xiii, and 2d ed., iv 



(1842), 131, XXXIII, j>«r<im. 

 Acris gryllus Dum. & Bibr., Erp. G6n., viii (1841), 506; Ang. Duni., Ann. Des. Sc. 



Nat., 3™'^ serie, xix (1853), 153; Giintlier, Cat. Brit. Mus., 1858, p. 71, j)arUm; 



Boulenger, Cat. Brit. Mus., ii ed., 1882, p. 336. 

 Acris acheta Baird, Proceed. Ac. Phila., 1855, j). 59. 



Body slender ; bead pointed. Limbs much elongated. Head^ longer 

 than wide. Web of hind foot extending only to the third articulation 

 (from tip) of longest toe. Tibia two-thirds length of body. Foot more 

 than half length of body. Colors much as in A. crepitans^ but brighter. 

 Inferior surface of thigh plain, or very slightly freckled with darker. 

 A narrow white line from eye to arm and a light line above the urostyle. 



Having presented a minute description of A. crepitans, it will only be 

 necessary here to give the principal points of difference as compared 

 with that species. The entire form is much more slender, and the limbs 

 longer in proportion. The head is much more acute, and the outline of 

 the lower jaw^ elliptical, instead of being nearly semicircular. The chord 

 of the rami is longer than their greatest width, not equal to it, and the 

 cleft ex tends further back. The tympanum in both is scarcely distin- 

 guishable. The tongue is large, triangular, and fleshy. The teeth are 

 in two small circular patches, between the inner nares, and separated by 

 quite an interval. The pallets at the tips of the more elongated fingers 

 and toes are very moderate, less prominent than in A. crepitans. The 

 fourth or longest toe projects beyond the rest much more than in A. 

 crepitans and the web scarcely extends on either side beyond its ante- 

 penultimate articulation, while in A. crepitans this web reaches to the 

 penultimate one and even as a very narrow margin to the very tip; nor 

 between any of the phalanges does the membrane extend to the disks as 

 in the other. 



The general distribution of color is the same, although the pattern is 

 brighter and clearer. All the blotches have a narrow border of white. 

 The posterior large one seems to extend higher up on the back. The up- 

 per jaw has four narrow white lines perpendicular to its edge on each 

 side, as in the other species, inclosing nearly equal spaces. There is a 

 light streak down the posterior part of the back above the urostyle which 

 we have not noticed in the other. The dark longitudinal line on the 



