Reptiles and Amphibians of Illinois. 343 



inches for variety gryllus and 1.2 for variety crepitans). None 

 of tbe Illinois specimens examined are more tlian 1.25 inches in 

 length of body. 



Ohorophilus, Baird. 



Baird, Proc. Acad. Nat. Sci. Phila., 1854, Vol. VII., p. 60. (Cho- 

 rophilus and Helocpetus of this reference are included in 

 the genus as now used.) 

 Cope, Troc. Acad. Nat. Sci. Phila., 186.5, p. 194. 

 Smith, Geo!. Surv. Ohio, Vol. IV., Zool. and Bot., Pt. I., Zool., 



1882, p. 704. 

 Digits but slightly expanded at the tips. Toes with very 

 small webs; fingers free. Tympanum small but distinct. 

 Tongue cordiform, excised, and partly free behind. Teeth 

 present on upper jaw and on vomer. Skin more or less granu- 

 late. Sacral diapophyses widely expanded. Prefrontals sepa- 

 rate from each other. Fronto-parietals embracing a fontanel, 

 without a postorbital process. Males with a subgalar vocal 

 sac. The species are all American. 



Ohorophilus triseriatus, Wiedraan. 



Hyla triseriatu, Wiedman, Reise 1, 1839, p. 249. 



Helocietus triseriatus, Baird, Proc. Acad. Nat. Sci. Phila., 1854, 



VlL,-p.60. 

 Chorophilus triseriatus, subsp. triseriatus, Cope, Check List N. 



A. Batr. and Kept., 1875. 

 Chorojjhilus triseriatus, Boulenger, Cat. Batr. Sal. in Coll. Brit. 



Mus., 2d ed., 1882, Sal. Ecaudata, p. 335. 

 Choroiihilus triseriatus triseriatus. Yarrow, Check List N. A. 



Kept, and Batr., 1882. 

 Chorophilus triseriatus, Davis and Rice, Bull. 111. State Lab. 



Nat. Hist-, I., No. 5. 1883, p. 19. 

 Chorophilus triseriatu,s, subsp. triseriatus, Davis and Rice, Bull. 



Chicago Acad. Sci., 1883. 



Small. Small webs between all the toes. Vomerine teeth 

 between, not behind, the internal nares. Dorsal surface finely, 

 ventral surface coarsely, granulate. Upper surface of head, 

 limbs, excepting the femora, and in males the throat, smooth. 

 Tympanum circular in outline, about half the longitudinal di- 

 ameter of the eye. Tongue elongate, slightly excised, and free 

 behind for about a third of its length. Upper jaw very slightly 

 9 



