(J(>i'i NORTH AMERICAN SNAKES— COPE. 



Eut^nia rufoptinctata Cope. 



ChUopoma ritfopunctaium Cope, Report U. S. Expl. Snrv. W. of 100th Mer., v, Rep- 

 tiles, by Yarrow, 187'), p. 514; Tropidonotus riijipnnctatus Gariuau, Mem. Mas. 

 Coiu[). Zoiil. Cainbr., viii, 1833, p. loO. Stijpocemus rvfopnnctatus Cope, Proceeds. 

 Amer. Philos. Soc. LSS5, p. :587. 



Southern Arizoua. 



TROPIDOCLONIUM Cope. 



Proc. Acad. Pliila., Id'nO, p. TO; Proc. Anier. Philos. Soc., 188G, p. 495; Bull. U. S. 

 Nat. Mns., Irf87, p. (JO; Microps Hallow., Proc. Acad. Phila., 1856, p. 241. 



Head not distinct from bod}'. Teeth equal. Scales keeled; and sab- 

 caudal scuta divided. Cephalic scuta normal; two internasals, rostral 

 not prominent. One nasal, one loreal, otie preocular. Anal })late 

 entire. 



This genus shows its position to be in the Xatricimie by the presence 

 of the vertebral liypapophyses on the posterior centra; and in its })attern 

 of coloration it resembles the genus Enta^iiia, and especially such a 

 species as E. leptocephala Bd. and Gird., where the head is not very 

 distinct. Tt is probably a terrestrial modification of that genus, as the 

 Glonophis kirt'andii is of Natrix. But one si)ecies of the genus is known. 

 The T. storcrioide-i lias a divided anal and must be placed in Natrix. 



Tropidocloninm lineatum Hallow. 



Cope, Proo. Aca.l. Phila., 1860, p. 76 ; Check List Batr. Rept. F. Amer., 1875, p. 42; 

 Microps /meaiHS Hallo well, Proc. Acad. Phila., 1856, p. 241 



This species is especially characteristic of the western ]iart of the 

 ]\Iississippi Valley, occurring in both the eastern and central regions. 

 It is not uncommon in northern Texas, the Indian Territory, and .south- 

 ern Kansas, extending north to Iowa inclusive. 



LIODYTES Cope. 



Proc. Amer. Pnilos. Soc, i"^^i4, p. VJ\; loc. cit., Isd6, p. 495; Bull. U. S. Nat. Mus 

 Wl, 1887, p. 60. 



Posterior maxillary tootli longer than those in front of it and sepa- 

 rated from them by an interspac^e. Cephalic plates normal, except that 

 there is but one internasal plate. Nostril subverlical. Two nasal plates 

 and one loreal. Scales smooth, no fossiij. Anal scutum divided. 



This genus is allied to Helicops Wagler, a form found only in conti- 

 nental South America. It differs from it in the smoothness of the scales. 



It incUules but one species, which has been found so far in Florida 

 only. 



Scales in eighteen rows; labials eight: internasal wider than long. Five rows oi' 

 caudal scales keeled. Dark brown, with two lateral brownish-yellow stripes on 

 each side ; below straw color L. allenii. 



