A412 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4ru SER. 
We have at hand only one specimen of Sonora semiannulata, 
Nol, 17550) collectedVat Cave Creek Maricopa Come pails ZO: 
1910. It agrees in all essential particulars with the description 
and plate given by Baird and Girard, and with the description 
by Cope, except in the number of its black dorsal cross-bands, 
which are forty on the body and ten on the tail. This is about 
twice aS many as in the specimens recorded by these authors. 
This specimen has 15 scale rows, gastrosteges 168, anal 
divided, urosteges 45, superlabials 7—7, infralabials, 7-7, pre- 
oculars 1-1, postoculars 2-2, loreal 1-1, temporals 1-2, 
posterior genials much shorter. The black bars each occupy 
about the length of two or three scales, and are separated by 
slightly greater light intervals. These intervals are yellowish 
white laterally with dark spots at the bases of the scales, while 
the central dorsal portions are pinkish anteriorly, becoming 
reddish orange toward and on the tail. The length to anus 
is 230mm., of the tail 56mm. 
48.—Sonora episcopa (Kennicott) 
Our collection contains no specimens of this pretty little 
snake. Mr. Herbert Brown showed me one in the collection of 
the University of Arizona. This specimen was collected at 
Yuma, and has scales in fourteen rows, gastrosteges 173, 
urosteges 47, loreal 1-1, and the typical coloration. 
I have described elsewhere (Proc. Cal. Acad. Sci., (4), III, 
1912, p. 153) two specimens from Yuma, which are in the col- 
lection of Stanford University. These had scales in 15 rows, 
gastrosteges 169, 168, anal divided, and urosteges 45, 47. 
49.—Sonora occipitalis (Hallowell) 
A fine specimen (No. 33451) was dug out of the sand at the 
base of a bush on a dune two or three miles east of Yuma, 
March 19, 1912. It was about a foot below the surface. 
In life, the dark rings were pure black, and between each 
pair of black rings was a transverse bar or half ring of cad- 
mium orange, of about the same width on the midline as the 
black rings, and separated from them by a nearly equal space, 
which was pale lemon yellow. This lemon tint extended down 
on to the sides, and the lower surfaces were a paler lemon. 
This specimen has 15 scale rows, gastrosteges 164, anal 
divided, urosteges 51, supralabials 7-7, infralabials 7-7, pre- 
