26 PROCEEDINGS OF IHE ACADEMY OF {JaU., 



temporals 1 anterior, ^vith 1, 2 or 3 iu the second row; upper 

 labials almost always 7, but iu one subspecies 6 or 8; posterior chin 

 shields lougest; scales in 19 rows (occ, 17 or 21), the outer row 

 smooth or faintly keeled; veutrals 138-165; sub-caudals 55-85. 

 The color range is very great : bluish, green, olive, brown and 

 almost black, usually with a dorsal stripe and a lateral on the 

 second and third rows, and three rows of spots on the back and 

 side; any or all of these may be absent; belly yellow, green or 

 black, generally with a roundish spot near the end of each ventral; 

 the head is dark above, usually with a parietal sj^ot ; labials mar- 

 gined with dusky. Maximum length about 900 mm. 



Hab. — The Avhole of North America, wherever snakes are 

 found, and extending into Mexico. 



Key to the Subspecies. 



Green, with spots, usually no stripes, . . . \. E. s. ordinatm. 

 Stripes and spots present; no red on sides, . . 2. E. s. sirtalis. 

 Stripes and sj^ots often obscure; generall}^ red on sides, 



3. E. s. jiciTietalis. 

 Color very dark ; 3 stripes; belly blue-black, 4. E. s. 2nckermgi. 

 Color dark, 3 stripes; head small; often 17 rows, 



5. E. s. leptocephala. 



Eutaenia sirtalis ordinata L. 



Coluber ordinatus L., Syst. Nat., Ed. XII. 379 (1766); E. s. ordinata 

 and E. s. (jraniinea (part) Cope, I. c, 662, and Rep. Nat. Mns., 1066, 

 1067; 2\ ordinatus forma typica Boul., /. c, I, -206. 



Green above; usually without stripes; spots generally distinct, 

 but in some cases obscure; belly greenish white; 19 rows of scales; 

 7 labials. 



Hab. — United Stat(!S east of Mississippi river. 



Eutaenia sirtalis sirtalis L. 



Coluber sirtalis L., Syst. Nat., Ed. X, 222 (1758); B. s. sirtalis, E. s. 

 (jraviiiiea (part), E. s. semifasciata, E. s. obsciira and E. butleri 

 Cope, I. c, 662, 663, 651, and Kcp. Nat. Miis., 1066, 1067-74, 1031 ; 

 7\ ordinatus var. sirt((lis (part) and var. butleri Boul., /. c, I, 206, 

 212; Thamnopliis butleri Stej., Proc. U.S. Nat. I\his., 1891, 593; 

 E. bruchystoma Cope, Am. Nat., 1892, 964, and Rep. Nat. Mus., 

 1056. 



This subspecies has almost always 19 rows of scales and 7 upper 

 labials; oculars 1-3; tem^iorals usually 1-2 (3), occasionally 1-1; 

 the color is variable, but is usually brown, bluish or green, with 

 the three light stripes well defined ; spots rather large and usually 



