Reptiles and Amphibians of Illinois. 343 



inches for variety (jryllus and 1.2 for variety crepitans). None 

 of tbe Illinois specimens examined are more than 1.25 inches in 

 length of body. 



CHOROPHIL.US, Baird. 



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

 rophilus and Helocajtus of this reference are included in 

 tlie genus as now used.) 



Cope, Proc. Acad. Nat. Sci. Phila., 1865, p. 194. 



Smith, Geo). Surv. Ohio, Vol. IV., Zocil. 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 diapophy.ses widely expanded. Prefrontals sepa- 

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

 without a postorbital process. Males with a subgular vocal 

 sac. The species are all American. 



Chorophilus triseriatus, Wiedraan. 



Ilijld triseriMit, Wiedman, Reise 1, 1839, p. 249. 



Heloca'tiis tristriatiis, IJaird, Proc. Acad. Nat. Sci. Phila., 1854, 



VII., p. 60. 

 Chorophilufi triacriatns, subsp. triseriatus. Cope, Check List N. 



A. Batr. and Kept., 1875. 

 Choro/thilus triseriatus. Boulenger, Cat. Batr. Sal. in Coll. Brit. 



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

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



Kept, and Batr., 1882. 

 Choro/)liifus- trisiriatus, Davis and Rice, Bull. 111. State Lab. 



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

 Chorophilus triseriatus, 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 



