Rei^tiJt's (ittd Aiiijihibians of JlJinois. 271 



Variety fasciatus. 



Dark brown, with transverse lozenge-shaped spots on the 

 back, and from thirty to thirty-eight red spots on each side. 

 Reddish white beneath. Dorsal scales in from twenty-three to 

 twenty-live rows. Anna, Union county. 



Variety erythrogaster. 



Uniform reddish brown or blackish above, bright reddish 

 or yellow beneath. Dorsal rows from twenty-three to twenty- 

 five. Peoria, southern Illinois, Anna (C. AV. Butler). 



Variety rhombifer. 



Brown above, with a series of rhomboid dark spots on the 

 back, which touch by their apices. More or less blotched with 

 black beneath. Dorsal rovs^s twenty-five (Hallowell gives this 

 number in his original description; later writers have given 

 twenty-seven as the proper number). Two specimens are in 

 the collection of the Northwestern University at Evanston, 

 one from (.'ook county, and the other from Union county. 



Nerodia cyclopium, Dum. et Bibr. 



Tropiilniioiiis fi/dopion, Dum. et Bibr., Erp. Gen. 1854, VII., p. .^7(5. 

 Ti<ij)i(t<>ii<>tiis fjichypiinn, Davis and Rice, Bull. 111. State Lab. 



Nat. Hist, I., No. 5, 188:^ p. 43.— S. Garman, Mem. Mus. 



Comp. Zoul., 1883, pp. 20, 142, pi. 2, fig. 4. 



Body moderately stout. Head swollen at the cheeks, nar- 

 rowed forward. Tail tapering, rather short. All the dorsal 

 scales carinate, those of the outer row less strongly, those of 

 the back very strongly, becoming sharp longitudinal keels on 

 the tail. Rostral about twice as broad as high. Nasal large, 

 nostril near the upper margin, but not quite dividing it into 

 two plates. Loreal large, widest below. One large anteorbital, 

 widest above. Two postorbitals and from two to three subor- 

 bitals. Supralabials greatly developed, eight in number; the 

 sixth and seventh much the largest. Infralabials from ten to 

 twelve; fifth and sixth largest. Dorsal rows from twenty- 

 seven to thirty-three. Ventrals about 144. Anal divided. 

 Subcaudals about 65 pairs. 



