340 Illinois State Lahorator// of Natural History. 



AORIS, DUM. ET BiBR. 



Dum. et Bibr., Erp. Gen., 1841, VIII.. p. 506. 

 Hoffmann, IJronn's Thier- Reich, VI., Amphibien, 1873-78, p. 647. 

 Smith, (Jeol. Surv. Ohio, IV., Zool. and Bot, Pt. I., Zooi., 1882, 

 p. 705. 



Digits but slightly expanded at their tips. Toes with 

 large webs; basal part of fourth and fifth toes bound together 

 by the integument; fingers free. No parotid. Tympanum 

 small and not distinct. Tongue short, cordiform, excised, and 

 partly free behind. Teeth present on upper jaw and on vomer. 

 Skin smooth or slightly roughened. Sacral diapophyses not 

 widely expanded. Parieto-frontals embracing a fontanel. 

 Males with a subgular vocal sac. The genus is peculiar to 

 America. 



Acris gryllus, LeC. Cricket-frog, Peeper, Savannah 

 Cricket. 



Var. gryllus. 



Rann (/ri/Ihis, LeC, Ann. Lye. Nat. Hist , N. Y., 1824, 1., p. 282.— 



Harlan, Jour. Acad. Nat. Sci. Phila., 1827, V., p. 340. 

 Acris gryllus, LeC, Proc. Acad. Nat. Sci. Phila., 1854, VII., 



p. 426. 

 Acris gryllus, subsp. gryltns, Cope, Check List N. A. Batr. and 



Kept., 1875. 

 Acris gryllus gryllus, Yarrow, Check List N. A. Kept, and Batr., 



1882. 

 Acris gryllus, subsp. gryllus, Davis and Rice, Bull. 111. State 



Lab. Nat. Hist, I., No. 5, 1883, p. 18; Bull. Chicago Acad, 



Sci., 1883. 



Var. crepitans. 



Acris crepitans, Baird, Proc. Acad. Nat. Sci. Phila., 1854, VII., p. 

 59; LeC, 1. c, p. 426.— Baird, Mex. Bound. Surv., 1851), Rep- 

 tiles, III., p. 28, pi. 37, flg. 14-17. 



Acris gryllus, subsp. crepitans, Cope, Check List, 1875. 



Acris gryllus crepitans, Yarrow, Check List, 1882. 



Acris gryllus, subsp. crepitans, Davis and Rice, Bull. 111. State 

 Lab. Nat. Hist., I., No. 5, 1883, p. 18; Bull. Chicago Acad. 

 Sci., 1883. 



Acris gryllus, Dum. et Bibr., Erp. Gen., 1841. VIII., p. 507.— 

 Boulenger, Cat. Batr. Sal. in Coll. Brit. Mus., 2d ed., 1882, 

 Sal. Ecaudata, p. 336. 



