31. ELAPHE—32. ARIZONA 701 
outer rows somewhat larger. Anal plate divided. Gastrosteges 
varying in number at least from 246 to 260. Urosteges in 
two series of from 107 to 113. 
The color above is uniform greenish olive. On stretch- 
ing the skin the base of each scale may be seen to be black, 
with a whitish spot on each side of the scale. The lower 
parts are uniform whitish, or yellow. There are no definite 
markings even in young specimens. 
Weng this: tomar toes eee es iI iors Te 660 965 
Teen ge thyo ta tal eeeaeweneeere reer ern sae eS = 280 
Distribution —Originally described from specimens 
from Guerrero and Jalisco, Mexico, this snake has since 
been found in the Santa Rita Mountains, Santa Cruz County, 
Arizona. Dr. Stone has recorded the two specimens taken 
there by Dr. H. A. Pilsbry, in 1910. One of these was 
secured in Agua Caliente Canyon, at an altitude of 6,000 
feet. 
Genus 32. Arizona 
Arizona Kennicort, U. S. Mex. Bound. Surv., Vol. II, 1859, Rept., 
p. 18 (type, elegans); Van DrenBurGH, Proc. Acad. Sci., Ser. 3, 
Vol. 4, 1906, p. 66. 
The body is long and slender, with tail of moderate 
length. The neck is constricted somewhat, so that the head 
is distinct. The snout is long, rounded, and but little lower 
than the flat top of the head. The cephalic plates are nor- 
mal. The nasals rarely unite above the nostril. One (or 
two) preocular, two (or one) postoculars, and a loreal are 
present. Temporals are 2+3 or 2+4. The scales are 
smooth, in 27 to 31 rows. The anal plate is single. Uros- 
teges are in two series. The eye is moderately large, with 
pupil nearly round in many alcohol specimens but vertically 
elliptic in life. 
