200 CALIFORNIA ACADEMY OP SCIENCES. 



b. Eye large; one preocular; scales in nineteen rows; dorsal line never 

 red. 



c. Lines wide; some red on body T. parietalis. p. 200. 



c 2 . Lines very narrow; no red on body; belly dusky. 



T. p. pickeringi!. p. 204. 

 b 2 . Eye small; two preoculars or scales in seventeen rows, or both; dorsal 



line sometimes red T. leptocephala. p. 205. 



a 2 . Upper labials eight. 



d. Scales in nineteen rows (if in 21 rows, some red on body or very dis- 

 tinct lines with few or no spots). 



e. Eye smaller; posterior geneials rarely much longer than anterior; 

 dorsal line yellow or red; head never red; belly sometimes red. 



T. elegans. p. 207. 

 e 2 . Eye larger; posterior geneials much longer than anterior; dorsal 

 line blue or yellow; head sometimes red; belly never red. 



T. parietalis. p. 200. 



d 2 . Scales in twenty-one (or twenty-three) rows; no red on body; 

 many spots or no distinct dorsal line, 

 f . Eye smaller; posterior geneials shorter or but little longer than 



anterior; belly marbled with slate; dorsal line present, 

 g. One preocular; scales in twenty-one rows. 



T. vagrans. p. 210. 

 g 2 . Two preoculars; scales in twenty-one or twenty-three rows. 



T. v. biscutata. p. 212. 



f 2 . Eye larger; posterior geueials much longer than anterior; belly 

 not marbled with dusky; dorsal line often absent. 



T. hammondii. p. 212. 



65 Thamnophis parietalis (Say). PACIFIC GARTER 

 SNAKE. 



Coluber parietalis, SAY, Long's Exped. Kocky Mts., I, 1823, p. 186 



(type locality Camp Missouri near Council Bluff). 

 Coluber infernalis, BLAINV., Nouv. Ann. du Mus., IV, 1835, p. 291, 



pi. XXVI, figs. 3-3. (type locality California). 

 Eutainia infernalis, B. & G., Cat. N. A. Kept., PL 1, Serp., 1853, p. 



26; GIRABD, U. S. Explor. Exped., Herp., 1858, p. 148, pi. XIV, 



figs. 11-16; BOCODBT, Bull., Soc. Zool. Fr., 1892, p. 40 (part). 

 Eutainia parietalis, B. & G., Cat. N. A. Kept., Ft. 1, Serp., 1853, p. 



28. 

 tEutaenia ornata, B. & G., U. S. Mex. Bound. Surv., Ill, Kept., 



1859, p. 16, pi. IX (type locality between San Antonio and 



El Paso, Tex.). 



