184 BATRACHIA: SALIENTIA. — XXVII. 
266. HYLA Laurenti. (van, forest.) 
518. H. versicolor Le Conte. Common TREE Toap. Green, 
gray or brown, with irregular dark blotches; below yellow, behind 
white; tympanum # diam. eye; fingers 4 webbed; skin with small 
warts. L.2. E. U.S., W. to Kan., very abundant and variable, 
Its “clear, loud trilled rattle” is heard mostly in the evening and 
in damp weather. 
519. H. pickeringii Holbrook. Yellowish brown or fawn-color, 
with dusky rhomboidal spots and lines, the latter usually arranged 
in the form of an oblique cross; head with lines; limbs barred ; 
tympanum very obscure. L.1. E. U.S. 
520. H. squirella Daudin. Olive green, with irregular dark 
blotches ; a dark bar between eyes; a white line along upper jaw 
to shoulder ; greenish white below, darker behind; throat with a 
few dark spots; legs marked with darker above; tympanum half 
diam. eye. L.1}. Ind. (Brookville, A. W. Butler) to S.C. (Eng. 
squirrel.) 
521. H. andersonii Baird. Deep pea-green; sides with irre- 
gular yellow spots; a green spot on throat; a purplish band from 
eye to arm; tympanum feye. L.1}4. N. J. toS.C., rare. 
Famity CVIT ENGYSTOMATIDAN. (Tue Tooru.ess 
FrRoGs.) 
Frog-like Batrachians with the maxillaries toothless and the 
diapophyses of the’ sacral vertebre dilated. Genera 18; species 
54, chiefly tropical. 
a. Pupil erect; tongue eHipheels iit hidden; toes free; no preco- 
racoids. .. + aie Dae isp te ExGyatoma, 267. 
267. ENGYSTOMA Fitzinger. fete contracted ; oropa, 
mouth. ) 
522. EB. carolinense Holbrook. Snout obtuse, not twice eye; 
skin smooth, a fold across head behind eyes. Brown, dotted with 
paler below. L.1. S.U.S., N. to Mo. 
Famity CIX. RANIDAN. (THE Froes.) 
Teeth well developed on upper jaw, and usually on vomer also; 
toes 4-5, all more or less webbed; ear well developed. Gencra 18, 
species 250, chiefly of the Northern Hemisphere and the East 
Indies. Most of them are aquatic, and similar to our common 
frogs. 
a. Vomerine teeth present; no finger opposable to the others; tongue emargi- 
nate behind; hind toes full-webbed. . . . . . . . © Rana, 268, 
268. RANA Linnezus. (Lat., frog.) 
a, Glandular folds on each side of back more or less distinct; web of feet not 
reaching tip of fourth toe. 
