664 NORTH AMERICAN SNAKES COPE. 



Eiitaenia sirtalis parietalis Say. 



Cope iu Yarrow'a Report Reptiles U. S. G. G. Survey W, of 100th raer., v, 1875, p. 

 .54G; Colubtr parietalis Say in Long's Exped. Rocky Mtus., 1823, i, p. 186 ; Harlan 

 Jonrn. Acad. Phila., v, 1827, p. 349. Eutwrna parietalis Bd. and Gird., Cat. 1-53, 

 p. 28. Eiitamia pickeringii Bd. and Gird., Cope Proc. Acad., Phila. 1883, p. 21; 

 Check List N. Am. Batr. Rept., 1875, p. 41, not of Bd. and Gird, E. ornata Bd. 

 and Gird., U. S. Mex. Bound. Surv., ii, Rept. 1859, p. 16, pi, — , fig. — . 



This sub-species covers the entire central region, and the Pacific 

 region. It is most abundant in the northern part of the latter, but is 

 found as fiir South as Fresno, Cal. 



Eiitaenia sirtalis concinna Hallow. 



Tropidouotns concinnus Hallowell, Proceed. Acad. Phila., vi, 1852, p. 182; Eiitaenia 

 concinna Bd. Gird., Cat, 1853, p. 146; Cope, Proc. Acad Phila., 1883, p. 23. 



From the western part of Washington and Oregon. 



Eutaenia sirtalis tetrataenia Cope. 

 In Yarrow's Report in U. S. Expl. Surv., W. of 100th mer., V, 1875, p, 546, 



In the topical specimen the tip ot the tail is injured, but it can be 

 restored with considerable probability, so that I estimate that the length 

 enters the total length four and one fifth times. The superior labials 

 eight, the anterior rather crowded, so that it may be that the normal 

 number is seven instead ot eight, in which case this form should be re- 

 ferred to the E. sirtalis rather than to the U. infernalis. The loreal 

 is as high as long, and the temporals are 1 — 2 — 3. The frontal is wider 

 than the superciliaries, and does not reach the preocular. The post- 

 genials are longer than the pregenials, Gastrosteges, 158 ; urosteges, 

 68 +. Total length, 800 milimeters ; of tail (tip lost), 118 +. 



The ground color is seen in the dorsal stripe and in the belly as high 

 as the third row of scales inclusive. This is bluish olivaceous. The 

 scales mentioned arc black at their bases and on tlieir adjacent edges, 

 and in the first row of scales the black covers the angular extremity 

 of the gastrosteges. No regular spots on the gastrosteges, as in most 

 subspecies of Eutwiiia sirtalis. There is no distinct lateral stripe. 

 The dorsal stripe covers one and two half rows of scales. Externally 

 on each side it is bounded by a black stripe, which also covers one and 

 two half rows of scales, and which extends to the base of the tail. Ex- 

 terior to this on each side is a red stripe, which also covers one and two 

 half rows of scales. Exterior to this on each side is a second black 

 stripe on each side which covers one and a half rows of scales and ex- 

 tends to the base of the tail, beyond which it is broken up into a series 

 of black spots. It is also broken up into spots for a short distance pos- 

 terior to the head. These spots have no connection with the superior 

 black band. Head olive gray with two pale parietal spots; no nuchal 

 spots. Superior labials with narrow black posterior borders on tlie 

 fourth, fifth, and sixth. Throat and chin yellowish, unspotted. No 

 black marks on middle of belly and tail below. 



