Reptilef! and Amphihians of Illinois. 295 



from the eye to the corner of the mouth and the elongate 

 bands on the neck and back part of the head. 



Ophibolus triangalus, Boie. Milk Snake, Chicken Snake, 

 House Snake, Thunder and Lightning Snake, King 

 Snake, Chequered Adder. 



Var. triangulum. 



Coluber triitiKjidii in. Boie, Isis, 1827, p. 537. 



Coliiher (ixiinins,Ro\\>v., N. A. Herp., 1842, III., p. f)9. pi. 15.— 



De Kay, Nat. Hist. N. Y., I., Zool. III., Kept, and Amph., 



1842, p. 38, pi. 12, fig. 25. 

 Ophibolus c.viniiiis, Hd. and Gir., Cat. N. A. Kept., Pt. I., 1853, p. 



87.— Kenn., Trans. 111. State Agr. iSoc, 1858-54, 1., p. 592. 

 Ahlabe.'i triancpilnin. Dum. etBibr., Erp. Gen., VII., 1854, p. 315. 

 (tphiboliis doUtitiis, subsp. trUnu/ulu.s, Davis and Rice, Bull. 111. 



State Lab. Nat. Hist. I., No. 5, 1883, p. 34 ; Bull. Chicago 



Acad. Sci., 1883. 

 (Jphibolu.s ttldugulKs, S. Garman, Mem. Mus. Comp. Zo()l., 



1883, pp. 65, 155, pi. 5, tig. 1 . 



Var, doliatus. 



Ophibolua doUatu.'i, Bd. and Gir., Cat. N. A. Rept. Pt. I., 1853, 



p. 89. 

 Ophibolus doliatus, subsp. doliatus, Davis and Rice, Bull. 111. 



State Lab. Nat. Hist., 1., No. 5, 1883. p. 34; Bull. Chicago 



Acad. Sci., 1883. 

 OpMhohis trianyulns, var. doliatus, S. Garman, Mem. Mus. 



Comp. Zool., 1883, pp. 66, 155. 



Body cylindrical, maintaining its diameter well toward 

 both extremities. Head of medium size. Neck rather thick 

 in adults. Eye small. Tail short. All the dorsal scales per- 

 fectly smooth. Rostral plate wider than high. Loreal quad- 

 rangular. One auteorbital. Two postorbitals. Seven suprala- 

 bials, eye above the third and fourth, lower postorbital resting 

 in a notch between the fourth and fifth. Nine infralabials, 

 the fifth much larger than the others. Dorsal scales in twenty- 

 one rows, the scales of the median rows differing less in size 

 from those of the lateral rows than usual. Ventrals about 211. 

 Subcaudals about o'l pairs (a few occasionally united). 



Color above pale brown or gray, with large dark brown or 

 reddish brown dorsal blotches edged with black, and low down 

 6 



