33. PITUOPHIS 709 
Urosteges in two series of from 53 to 79, males having from 
59 to 79, females from 53 to 78. 
The ground color is pale brown or yellowish gray, 
sometimes obscured by the spreading of the blotches or the 
presence of dark marks along the keels of its scales. Along 
the middle of the back between the head and a point over 
the anus is a series of from 56 to 93 (average 70) dark brown 
or black blotches. On the upper surface of the tail are from 
14 to 30 (average 21.4) dark blotches. There are several 
series of smaller alternating dark blotches or spots on the 
sides. These spots sometimes tend to unite to form longi- 
tudinal lines. Across the top of the head, between the 
preocular plates, is a line of black or brown. A similar line 
runs down from the center of the eye and another back and 
down from the upper postocular plate. The lower surfaces 
are yellowish white, usually maculated with black or brown. 
Length to anus. OS 660 820 860 1200 1260 
Length of tail______. 52 135 165 170 270 210 
Variation One specimen has no loreal plates; the 
other 103 all have the normal loreal 1—1. The preoculars 
are 2—2 in seventy-nine, or 78%; 1—1 in seventeen, or 
16% ; and 1—2 in six, or 6%. The postoculars are 3—3 in 
seventy-one, or 69%; 3—4 in eighteen, or 17%; 44 in 
eleven, or 11%; 4—5 in one, or 1%. 2—3 in one, or 1%; 
and 2—2 in one, or 1%. The temporals are 4—4 in thirty- 
nine, or 38%; 3—3 in twenty-six, or 25%; 3—4 in twenty- 
one, or 20%; 4—5S in nine, or 9%; 2—3 in three, or 3%; 
2—2 in three, or 3%; 5—S5 in one, or 1%; and 2—4 in 
one, or 1%. The supralabials are 8—8 in fifty-six, or 54%; 
8—9 in twenty-seven, or 26%; 9—9 in fourteen, or 14%; 
9—10 in three, or 3%; 7—8 in two, or 2%; and 10—10 
in one, or 1%. The infralabials are 13—13 in thirty-two, 
or 31%; 12—12 in twenty-two, or 21%; 12—13 in nine- 
