418 CALIFORNIA ACADEMY. OF SCIENCES [Proc. 4TH SER. 
along mid back are lighter yellowish with whitish edges and 
with reddish or reddish brown marking near the base of each 
scale. The dark markings are in part blackish brown, in part 
deep olive. The head is light olive with darker olive mark- 
ings. 
This specimen contained a Dipsosaurus which it had eaten. 
66.—Pituophis catenifer deserticola Stejneger 
A large specimen, No. 33447, was found under some boards 
near Yuma, March 17, 1912. Two, Nos. 33869, 33870, were 
caught near the Santa Cruz River at Tucson, April 9, 1912; 
one, No. 34755, in Carr Canyon, Huachuca Mts., July 20, 1912, 
and three specimens, Nos. 17541, 17546, 17547, were secured 
at Cave Creek. 
No. 33447, from Yuma, has scale rows 33, gastrosteges 258, 
anal single, urosteges 59, supralabials 8-8, infralabials 12-12, 
preoculars 1-1, postoculars 4-5, temporals 34-3 loreal 1-1, 
posterior genials shorter. This snake contained a small rodent. 
No. 33869, from Tucson, has scale rows 33, gastrosteges 
237, anal single, urosteges 59, supralabials 9-10, infralabials 
12-12, preoculars 1-1, postoculars 3-4, temporals 2--3, loreal 
1-1, posterior genitals shorter. 
No. 33870, from Tucson, has scale rows 31, gastrosteges 
226, anal single, urosteges 64, supralabials 8-8, infralabials 
13-13, preoculars 1-1, postoculars 3-3, temporals 3-++3, loreal 
1-1, posterior genials shorter. | 
No. 34755, from Huachuca Mts., has scale rows 33, gastro- 
steges 233, anal divided, urosteges 57, supralabials 8-8, infra- 
labials 13-14, preoculars 1-1, postoculars 3-4, temporals 4-4, 
loreal 1-1, posterior genials shorter. 
No. 17541, from Cave Creek, has scale rows 31, gastro- 
steges 237, anal single, urosteges 64, supralabials 9-9, infra- 
labials 14-14, preoculars 2-2, postoculars 4-4, temporals 3-3, 
loreal 1-1, posterior genials shorter. 
No. 17546, from Cave Creek, has scale rows 35, gastro- 
steges 245, anal single, urosteges 60, supralabials 9-9, preocu- 
lars 1-1, postoculars 3-3, loreal 1-1, posterior genials shorter. 
