North American batrAciiia and reptilia. 
39 
beneath greenish-wliite; 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. faireyi , 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. jproxima, (Say.) B. and G. Color above black; 
dorsal stripe ochraceous yellow or brown ; lateral ones greenish- 
white or yellow; light below lateral lines; beneath greenish- 
white and yellowish; tail three and one-half or more times in 
total length; G. 165-180. Mississippi Valley 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. 
b. 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 live 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 
plumbeous or slate color; superior labials eight; G. 160-180. 
Central, Pacific, and Northern regions; Illinois (Nelson). 
b. 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; 
