820 13. COLUBRIDE 
in three hundred and thirty-nine, or 93%; 2—2 in fifteen, 
or 4%; 1—2 in seven, or 1%; and 2—3 in one. Postocu- 
lars are 3—3 in three hundred and twenty-one, or 88%; 
3—4 in fifteen, or 4%; 2—3 in ten, or 2%; 2—2 in eight, 
or 2% 3 4—4 in six, or 1% 3 4——5 in one, and 1—2 in one. 
Temporals are 1+2—-1+2 in two hundred and eighty, or 
77%; 1+2—1+3 in forty-four, or 12%; 1+3—1+3 in 
sixteen, or 4%; 1+1—1-+1 in ten, or 2%; 1+1—1+2 
in five, or 1%; 1+1—2+2 in two, 1+2—2+2 in two, 
1+1—1+3 in one, and 1+3—2+2 in one. The supra- 
labials are 8—-8 in three hundred and nine, or 85%; 7—7 
in twenty-six, or 7%; 7—8 in twenty-five, or 6%; 8—9 
in one, and 9—9 in one. The infralabials are 10—10 in 
two hundred and seventy-two, or 75%; 9-10 in forty-four, 
or 12%; 9-9 in thirty-two, or 8%; 10-11 in five, or 1%; 
8—9 in three, 8—10 in three, 11—11 in two, and 8—8 in 
one. The scale-rows are 19—19—17 in two hundred and 
fifty-five, or 71%; 19—-21—17 in twenty-seven, or 7%; 
21—21—17 in twenty-two, or 6%; 19—21—19 in twenty- 
one, or 6%; 21—21—19 in nine, or 2%; 21—19—17 in 
six, or 1%; 17—19—17 in four, or 1%; 19—19—19 in 
three, 19—20—19 in three, 20—-21—19 in one, 17—18— 
17 in one, 19—19—15 in one, and 20—-21—17 in one. The 
gastrosteges vary in number from 140 to 172, males having 
from 146 to 172, females from 140 to 168; the average in 
one hundred and fifty males is 158, in two hundred and 
four females, 153. The urosteges vary from 52 to 93, 
males having from 63 to 93, females from 52 to 86; the 
average in 131 males is 81, in 168 females, 74. 
It now is well known that variation in the coloration of 
the snakes of this subspecies is very great. Certain types of 
coloration may be pointed out as occurring in groups of 
specimens. The best known of these color types, perhaps, 
is that in which the general color is dark olive, lateral lines 
