154 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER. 
five scales wide on the body, and two or three on the tail. The 
central two or three rows show only very faint darker mark- 
ings, but the scales of the more lateral rows are marked each 
with a central dash of dark hair-brown, while their margins 
are whitish. The dark dashes therefore appear as a brown line 
along the middle of each row of scales, with the exception 
of a few of the dorsal rows, while the ground color is reddish 
dorsally and white laterally. The head is pale yellowish brown 
with a large dark brown blotch on the parietal and frontal 
plates. This specimen has scales in 15 rows, gastrosteges 169, 
urosteges 45, postgenials very small, supralabials 6-7, infra- 
Jabials 6-6. It measures: length to anus 270 mm., length of 
tail 59 mm. Ina second specimen the reddish dorsal band is 
rendered less distinct by the presence on the dorsal scales of 
central dark markings similar to those of the lateral scales. 
The scales are 15 rows, gastrosteges 168, urosteges 47, post- 
genials very small, supralabials 7-7, infralabials 6-6. 
13. Rhinocheilus lecontei Baird & Girard.—A single snake 
of this species was secured May 23, 1899. Its labials are 3; 
scale rows 25; gastrosteges 206; urosteges forty single, fol- 
lowed by eight pairs. 
14. Lampropeltis conjuncta (Cope) ?— One milk-snake, 
caught June 5, 1899, is very similar in coloration to specimens 
from the Cape Region of Lower California. It has 23 rows of 
scales, 237 gastrosteges, and 57 urosteges. 
15. Bascanion flagellum frenatum Stejneger.—One speci- 
men taken May 21, 1899, has scales in 17 rows, gastrosteges 
193, urosteges 100. 
16. Thamnophis marcianus (Baird & Girard.—I refer to this 
name two garter-snakes captured at Yuma. The larger meas- 
ures 375 mm. to anus, tail94 mm. These specimens agree in 
having the lateral stripe on the third or the second and third 
rows, nuchal blotches and labial markings very distinct, one 
row of scales smooth, postgenials much longer than anterior, 
and gastrosteges 159. In one specimen the scales are in 21 
rows, temporals 1-3, supralabials 8-8, and urosteges 65. In 
the other the scales vary in number from 21 to 26 rows, tem- 
porals 1-2, supralabials 7-8, and urosteges 54 (tip missing). 
CALIFORNIA ACADEMY OF SCIENCES, 
November, 1911. 
