33. PITUOPHIS 731 
ning back and down from the upper postocular plate. The 
top of the head posteriorly has a few small, scattered, dark 
spots. The spaces between the dark dorsal blotches on the 
posterior portion of the body are yellow or orange yellow, 
usually somewhat obscured by dark brown streaks along the 
keels of the scales. The lower surfaces are yellow or yellow- 
ish white with irregular spots or blotches of dark brown or 
black on the gastrosteges and urosteges. There is no definite 
median subcaudal black band. 
Length to anus..__..___ 758 800 863 1028 25 1125 
Eenpth of tala 126 148 168 179 190 207 
V ariations—Twenty-nine specimens from Utah show the 
following variations. The loreals are 1—1 in all. The pre- 
oculars are 1—1 in twenty-one, or 87%; and 2—2 in three, 
or 13 % of those undamaged. The postoculars are 3—3 
in twelve, or 52%;; 2—2 in ten or 43%; and 2—3 in one, 
or 4%. The temporals are 3—4 in ten, or 43%; 4—4 in 
seven, or 31%; 4—5 in three, or 13%; 3—3 in one, or 
4%; 2—3 in one, or 4%; and 3—S in one, or 4%. The 
supralabials are 8—8 in thirteen, or 56%; 8—9 in five, or 
22%; and 9—9 in five, or 22%. The infralabials are 
13—13 in eight, or 38%; 12—13 in five, or 24 %3; 12—12 
in four, or 18%; 11—11 in two, or 9%; 11—12 in one, or 
5%53 and 13—14 in one, or 5%. The scale-rows are 29 in 
fifteen, or 56%; 31 in seven, or 26%; and 27 in five, or 
18%; the average is 29 rows. The gastrosteges vary in 
number from 223 to 241, males having from 227 to 241, 
females from 223 to 240; the average in twenty-two males 
is 233, in five females, 235. The urosteges vary from 55 
to 71, males having from 58 to 71, females from 55 to 62; 
the average in twenty-three males is 66, in five females, 60. 
The dark blotches between head and anus in 29 speci- 
