814 13. COLUBRIDA 
blackish streak usually runs back from the eye in specimens 
light enough to show it. The labials are bluish gray or 
yellowish. The pineal spot is often present on the suture 
between the parietal plates. The belly may be yellowish, 
olive, plumbeous, or slate; the throat is yellowish white; 
the lower surface of the tail is sometimes brick red. 
Length to anus __._____ 372 395 420 518 560 585 
Length of tail ____. 105 112 115 133 164 138 
Variation.—Three specimens have no loreal plates; one 
has a loreal on one side only; the others have the normal 
loreal I—1. The preoculars are 1—1 in two hundred and 
seventy-nine, or 86%; 1—2 in twenty-six, or 8%; and 
2—2 in twenty, or 6%. The postoculars are 3—3 in two 
hundred and eighty-four, or 87%; 2—3 in twenty-four, or 
7% 53 2—z2 in sixteen, or 5%; and 1—2 in one. The tem- 
porals are 1+2—1+2 in two hundred and eighty-nine, 
or 89% ;1+2—1+1 in eighteen, or 6%; 1+2—1+3 in 
eight, or 2%; 1+1—1-+1 in four, or 1%; and 3+3—3+3 
in three, or 1%. The supralabials are 7—7 in two hundred 
and eighty-three, or 85%; 7—8 in twenty, or 6%; 7—6 
in nine, or 3%; 8—8 in five, or 2%; 6—6 in four, or 1%; 
5—5 in one, and 8—6 in one. The infralabials are 8—8 
in one hundred and seventy-nine, or 55%; 9—9 in fifty- 
eight, or 18% ; 8—9 in fifty-four, or 17%; 7—8 in six- 
teen, or 5%; 7—7 in nine, or 3%; 9—10 in six, or 2%; 
and 6—7 in two. The scale rows are 17—17—15 or 
17—15—15 in two hundred and thirty-six, or 72%; the 
other 28% all have 19 rows, but the formula may be 
1719-17-15 17-1917, 19-9 49, 191 
162, females from 135 to 154; the average in 118 males 
in number from 135 to 162, males having from 138 to 
17—19—17, or 17—18—19—17. The gastrosteges vary 
is 149.2, in 158 females it is 144.8. The urosteges vary 
