OPHID1A COLUBRIDAE ECTAENI A VAGRANS VAGRANS. 551 



"E. ordinata, B. and Gr., Catalogue. Resembles E. sirtalis, the spotted 

 variety ; may be distinguished by the 3 regular series of tesselated, black 

 spots on each side, their prominence, and their number about 85, not 70 ; 

 olive, with 3 distinct rows of dark square spots, one on each side ; lateral 

 stripe wanting ; dorsal very indistinct. 



" 3. Dorsal rows 17. 



"E. atrata, Kennicott, part ii, vol. xii, P. R. R. Rep. Body moderately 

 stout; head small and narrow; eye very small; a very broad, deep, lemon-yel- 

 low, dorsal stripe covering nearly 3 rows, and distinct from head to tip of tail ; 

 the rest of the upper parts entirely deep, the black without a trace of the 

 lateral stripe, or of light spots ; abdomen uniform greenish slate ; yellowish 

 green under the head. 



"E. cooperi, Kennicott, loc. cit. Body stout, as in E. radix; head 

 short, depressed anteriorly ; above uniform blackish brown, without, spots 

 or olivaceous brown, with two rows of black spots, as in E. vagrans, but 

 which do not encroach upon the stripes ; dorsal stripes yellowish, distinct 

 on one or two half rows ; lateral stripe usually distinct ; abdomen slate color, 

 sometimes lighter, frequently tinged with red. 



EUTAENIA VAGRANS, Baird & Girard, subspecies VAGRANS, Baird & Girard. 



Eutcenia vagrant, BAIRD & GIRARD, Cat. N. A. Serp., 1853, 35. GIRARD, Herp. U. S. 



Exp. Exped., 1858, 154. BD., P. R. R. Rep., x, 1859, 19. COOP. & SUOKL., 



Nat. Hist. Wash. Terr., 1860, 297. COPE, Proc. Acad. Nat. Sci. Pbila., 1866, 



305-307. 

 Eutaenia vagrans subspecies vagrans, BAIRD & GIRARD, COPE, Check-List N. A. 



Batrach. & Kept., 1875, 41. 

 HAB. Central Pacific and northern parts of Sonoran Regions. 



The most abundant species inhabiting the Western States and Terri- 

 tories; exhibiting, also, great diversity of coloration. The differences in 

 some of the specimens captured, such as variation in number of side spots, 

 head shields, &c., might almost entitle them to be classed as subspecies. 



The specimen in the list marked E has on the right side three postor- 

 bitals, on the left four. 



