184 batraciiia: SALIENTIA. — XXVII. 



266. HYLA Lauri-nti. {vXij, forest.) 



r>is. H. versicolor I.t- Coiitt'. Common 'I'ukk Toad. Green, 

 gray or brown, with irrej^ular dark blotches; below yellow, behind 

 while; tynipaiuiin j; diain. eye; lingers J webbed; skin with «inall 

 warts. L. 2. E. U. S., \V. to Kan., very abundant and varialile. 

 Its "clear, loud trilled rattle" is heard mostly in the evening and 

 in danii) weather. 



519. H. pickeringii Ilolbrook. Yellowish brown or fawn-color, 

 with dusky rh()inl)<)ld:il spots and lines, the latter usually arrani^ed 

 in the form of an oblique cross; head with lines; limbs barred; 

 tympanum very obscure. L. 1. K. U. S. 



5".'n. 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. ( Brook ville, 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 purj)lish band from 

 eye to arm ; tympanum J eye. L. 1^. N. J. to S. C, rare. 



Family CVIII. ENGYSTOMATID^. (The Toothless 



Vnoas.) 

 Frog-like Batracliians with the maxillaries toothless and the 

 diapophyses of the sacral vertebrfe dilated. Genera 18; species 

 54, cnielly tropical. 



a. Pupil erect; tongue elliptical ; tympanum hidden; toes free; no prcco- 

 racoids Exgy.stoma, 2(j7. 



267. ENGYSTOMA Fitzingcr. (eyyvr, contracted ; oro/xa, 

 mouth.) 



522. E. carolinense Ilolbrook. 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. 



Familv CIX. RANID^. (The Frogs.) 



Teeth well developed on uppcT jaw, and usually on vomer also; 

 toes 4-5, all more or less webbed; ear well develo|)ed. Geiu-ra IS, 

 ppecies 250, chiefly of the Northern Hemis|)here and the East 

 Indies. Most of them are aquatic, and similar to our common 

 frogs. 



a. Vomerinp teeili present; no finper opposalile to the olhon>; tnnprie emarfji- 

 nate behind; liiiid dies full-wel>lHMl Uana, 2u8. 



268. RANA I/inna!us. (T.at.. frog.) 



a. Glandular folds oii <-nr\\ siiU- of hack more or Icsa distinct; web of feet not 

 reaching; tip of fuiirlli lue. 



