Reptiles and Ainphihinns of Illinois. 2{y-\ 



Throughout the State. Cook Co. (Mus. N. W. Univ.), 

 Peoria (Brendel), Normal, Wabash Valley (Ridgway). 



Ophibolus, Bi). and Gir. 

 Bd. and Gir., Cat. N. A. Kept., Ft. I., 1853, p. 82. 

 Dorsal scales smooth,- in from seventeen to twenty-five 

 rows. Anal plate entire. Rostral normal. Two internasals. 

 Two prefrontals. Two nasals, occasionally but one. Loreal 

 present or, rarely, wanting. One anteorbital. Two or three 

 postorbitals. Body moderately stout. Head not well sepa- 

 rated from the body. 

 Dorsal scales in 25 rows. Spotted with olive-brown above. 



Obsoletely blotched below 0. calligaster. 



Dorsal scales in 21 rows. Spotted with chestnut-brown or with 

 red above. Blotched with black below. . . .0. triangulus. 

 Dorsal scales in 21 rows. Light chestnut-brown above, with 

 obscure blotches. Uniform reddish yellow beneath or ob- 

 soletely blotched 0. rhombomaculatus 



Dorsal scales in 21 rows. Chiefly black above, with narrow 

 transverse yellow lines which bifurcate on the flanks or not. 

 Most of the dorsal scales with a yellow spot in some ex- 

 amples 0. GETULUS. 



Dorsal scales in 19 rows. Loreal plate present. Red, with 

 black rings '. 0. doliatus. 



Dorsal scales in 19 rows. Loreal plate wanting. Red, with 

 black rings ' 0. elapsoidea. 



Ophibolus calligaster, Harlan. 



Ciihihir <(illi(i<(stei\ Harlan, Jour. Acad. Nat. Sci. Phila., 1827, 



v., Ft. II., p. 359. 

 oji/iihii/tis t-rtiiisli, Kenn., Proc. Acad. Nat. Sci. Fhila., 1859, p. 99. 

 LiiiupnqxUis rdJIiiidsit'r, Cope, Free. Aead. Nat. Sci. Fhila., 1860, 



p. 255. 

 <)j)hibo]iis (■alliijitsftr, Davis and llice. Bull. 111. State Lab. Nat. 



Hist., I., No. 5, 1883, p. 34; Bull. Chicago Acad. Sci. 1883. 

 ophihoJns tridiif/iiliis, var. caUiuustdr, S. Garman, Mem. Mus, 



Comp. Zoo!., 1883, pp. fi6. 185. 



Rather large. Body tapering gradually to the extremi- 

 ties. Head of moderate size, not noticeably wider than the 



