13. COLVBRID.^ 



Eutania elegans elegans Brown, Proc. Acad. Nat. Sci. Phila., 1903, p. 



288 (part). 

 Eutania elegans Ditmars, Reptile Book, 1907, p. 225, pis. LXVI, figs. 



3, S, II, LXXIX, fig. I. 

 Eutania elegans infernalis Ditmars, Reptile Book, 1907, p. 227, pi. 



LXIX, fig. 2. 

 Thamnophis ordinoides elegans Ruthven, Bull. U. S. Nat. Mus., No. 61, 



1908, p. 138 (part); Stejneger & Barbour, Check List N. Amer. 



Amph. Rept., 1917, p. 102 (part); Grinnell & Camp, Univ. Cal. 



Publ. Zool., Vol. 17, No. 10, 1917, p. 180 (part). 

 Thamnophis ordinoides atratus Van Denburgh & Slevin, Proc. Cal. 



Acad. Sci., Ser. 4, Vol. VIII, No. 6, 191 8, p. 224, pi. 9. 



Description. — Head distinct from neck, flat-topped, with 

 rather narrow, rounded snout, and temporal regions some- 

 times swollen. Eye of moderate size. Rostral large, 

 bounded behind by internasal, anterior nasal, and first labial 

 plates. Plates on top of head: a pair of internasals, a pair 

 of prefrontals, supraocular of each side, a frontal, and a 

 pair of parietals. Anterior and posterior nasals distinct. One 

 loreal. One or rarely two preoculars and from two to five 

 (normally three) postoculars. Temporals normally one 

 followed by two, sometimes 1 + 1, 1+3, or 2+2. Eight, 

 or rarely seven, nine, or 1 0, superior and 1 0, or rarely eight, 

 nine or 1 1 inferior labials, fifth or sixth superior and fifth, 

 sixth or seventh inferior usually largest, fourth and fifth or 

 third and fourth superior usually reaching eye, first pair 

 of inferior meeting on median line. Two pairs of genials, 

 posterior equal to or little longer than anterior. Scales on 

 body in 1 9 or 2 1 rows. Anal plate undivided. Gastrosteges 

 varying in number from 140 to 172, males having from 146 

 to 172, females from 140 to 168. Urosteges in two series of 

 from 52 to 93, males having from 63 to 93, females from 

 52 to 86. 



The head is brown or olive above, never red. The 

 labials are yellow or olive. The chin and throat are yellow 



