Vo. IIT] VAN DENBURGH AND SLEVIN—ARIZONAN REPTILES 413 
oculars 1-1, postoculars 2-2, loreals 1-1, temporals 1+-2, pos- 
terior genials very small, black bars 21 on body and 8 on tail. 
A second specimen (No. 33809) from Yuma, presented by 
Mr. Herbert Brown, has scale rows 15, gastrosteges 167, anal 
divided, urosteges 22++, supralabials 7—7, infralabials 8-8, pre- 
oculars 1-1, postoculars 2-2, loreals 1-1, temporals 1+2, pos- 
terior genials very small, black bars 22 on body. 
51.—Rhinocheilus lecontei Baird and Girard 
No. 35295, Desert Laboratory, Tucson, June 20, 1912.— 
Scale rows 23, gastrosteges 197, anal entire, urosteges 51 last 
six divided, supralabials 8-8, infralabials 8-8, preoculars 2-2, 
postoculars 2-2, loreal 1-1, temporals 2+-3, posterior genials 
shorter, 25 dark blotches on body and tail. 
No. 33843, Arizona.—Scale rows 23, gastrosteges 193, anal 
entire, urosteges 50 of which 10 are divided, supralabials 8-8, 
infralabials 9-9, preoculars 1-1, postoculars 2—2, loreal 1-1, 
temporals 2+-3, posterior genials shorter. 
No. 33842, Arizona.—Scale rows 23, gastrosteges 186, anal 
entire, urosteges 47 of which 12 are divided, superlabials 8-8, 
infralabials 9-10, preoculars 1-1, loreal 1-1, temporals 2+3. 
No. 33844, Arizona.—Scale rows 23, preoculars 1-1, post- 
oculars 2—2, supralabials 8-8. 
No. 33838, Tucson, July 22, 1892.—Supralabials 7-8, pre- 
oculars 1-1, postoculars 2—2, loreal 1-1, temporals 2+3. 
53.—Salvadora grahamiae Baird and Girard 
The present collection includes six specimens of this snake. 
The scale counts are as follows: | 
No. 33453, Yuma, March 14, 1912.—-Scale rows 17, gastro- 
steges 211, anal divided, urosteges 67, supralabials 9-10, infra- 
labials 10-10, preoculars 2-2, postoculars 2-2, loreals 1-1, 
temporals 2+3, genials equal. This specimen was caught late 
in the afternoon, as it was traveling along under some bushes 
on the desert. 
No. 33810, Yuma, Herbert Brown.—Scale rows 17, gas- 
trosteges 209, anal divided, urosteges 98, supralabials 9-10, 
infralabials 9-9, preoculars 1-1, postoculars 3-3, loreal 2-2, 
temporals 2+-2, genitals equal. 
No. 35296, Tucson, June 20, 1912.—Scale rows 17, gas- 
