Reptiles and Amphibians of Illinois. 267 



Tropidonotiis sirUilis, S. Garraan, Mem. Mus. Comp. Zool., 1883, 

 pp. 24, 138, pi. 3, fig. 3. 



Var. parietalis. 



f'oliihei- j>(iii(4(ilis, Say, Long's Exped. to Rocky Mts., 1823, I., p. 



186. 

 Evtaiitid i)ai'i(4(tlis, Bd. and Oir., Cat. N. A. Kept., Pt. I., 1853, 



p. 28. 

 Eutivnla sirtalis, subsp. juiri^'tidis, Davis and Rice, Bull. 111. 



State Lab. Nat. Hist., L, No. 5, p. 40; Bull. Chicago Acad. 



Sci., 1883. 

 'Troj)if/nii()t>is sirUth's, var. j)(fn'rf(//)s, S. (rarman, Mem. Mus. 



Zool., pp. 25, 139. 



Body moderately slender. Head distinctly wider than 

 neck. Tail slender, tapering. Dorsal scales all carinated. 

 Frontal hexagonal.. Two nasals. A single large anteorbital. 

 Three postorbitals. Supra] abials seven; fifth and sixth largest. 

 Ten infralabials; fifth and sixth largest. Dorsal rows nine- 

 teen. Ventrals about 140-170. Anal entire. Subcaudals 

 about 60-80. 



Colors extremely variable. From light olive-brown to 

 blackish brown above, with three longitudinal green or yellow 

 stripes. Head olive-brown above, white below. Pupil with a 

 narrow brassy ring about it. Iris blackish with some copper- 

 color above and below. Tongue red, black-tipped. The dorsal 

 stripe occupies one and two half rows of scales. The lateral 

 stripes occupy the second and third rows of each side. The 

 ground color may be nearly uniform, or with two series of 

 black spots on each side. Black spots are generally present on 

 the side, beneath the lateral stripes. Green beneath, with a 

 series of black spots on the scutes at each side. Head brown 

 above, with a pair of small yellow spots at the inner edges of 

 the parietals. Supralabials greenish, uniform, or with black 

 posterior margins. 



Total length, 40.25; tail, 8. 



Throughout the State. Abundant. Freeport, Oregon, 

 Peoria, Normal, Bloomington, Champaign, Anna. 



Variety parietalis. 



In addition to the typical form of the species this variation 

 is quite frequently met in the eastern part of the State. It is 



