NORTH AMERICAN BATRACHIA AND REPTILIA. 39 



beneath greenish-white ; tail more than three and less than 

 three and one-quarter times in total length ; G. 150-160. Aus- 

 troriparian and Eastern regions, 



50. E. faireyiy B. and G. Garter Snake. Color above 

 blackish-brown; beneath greenish-white; color above and below 

 lateral lines the same; tail less than one-third total length; G. 

 165-180. Mississippi Valley from Louisiana to Wisconsin. 



**Stripes not uniform in color. 



51. E. proxima^ (Say.) B. and G. Color above black; 

 dorsal stripe ochraceons yellow or brown; lateral ones greenish- 

 white or yellow; liglit below lateral lines; beneath greenish- 

 white and yellowish; tail three and one-half or more times in 

 total length; G. 105-180. Mississippi Yalley north to Wiscon- 

 sin ; Texas and Northern Mexico. 



■y. Dorsal band incomplete or wanting; all scales keeled. 



52. E. sackeni^ Kenn. Color above olive-black; not 

 lighter below the very narrow greenish-yellow lateral stripes; 

 beneath uniform greenish; tail one-third total length. Floridan 

 district. 



h. Scales above and below lateral line with sub-quadrate 

 black spots. 



53. E. radix^ B and G. Hoy's Garter Snake. Color 

 above varying from deep brownish-black to olive-green; with 

 three narrow gamboge-yellow stripes; six series of black spots, 

 sometimes obscure ; below greenish with black markings pre- 

 dominating on sides; tail about five times in total length; 

 superior labials seven; dorsal scales rough, in 19-31 rows; G. 

 150-160. Central region to Lake Michigan ; Oregon. 



B. Lateral stripe on second and third rows of scales. 

 a. Scales in 21 rows. 



54. E. vagrans^ B. and G. Color above ashy or brown, 

 with dorsal stripe on a single row of scales, sometimes wanting; 

 on each side about 100 small black spots in two series; beneath 

 ])lumbeous or slate color; superior labials eight; G. 160-180. 



.Central, Pacific, and Northern regions; Illinois (Nelson). 

 h. Scales in 19 rows. 

 X. A dorsal band. 



55. E. sirtalis^ subsp. sirtalis, (Linn.) Cope. Common 

 Garter Snake. Color above olivaceous-brown, three series of 

 small spots on each side, about 70 from head to anus ; the upper 

 series encroaching on the narrow and rather indistinct dorsal 

 stripe; greenish-white below the lateral lines and on abdomen; 



