42. CHILOMENISCUS 873 
oculars. Temporals one followed by one. Supralabials 
seven, third and fourth reaching eye, second, third and fourth 
high. Inferior labials eight, second smallest, fourth largest, 
first pair meeting on median line. Genials in two pairs, 
Posterior much smaller. Scales on body smooth, in 13 rows. 
Anal plate divided. Gastrosteges 121. Urosteges 23, in 
two series. 
The color above is creamy white, crossed by dark brown 
bands, most of which are edged with black. These dark 
markings extend onto the tips of the gastrosteges. They 
number 32 on the body and seven on the tail. The dark 
markings on the upper surface of the tail are as distinct as 
on the body. On the lower surface of the tail very faint 
continuations of the dark markings complete the rings. The 
interspaces between the dark bands do not differ much from 
the dark markings in measurement along the middorsal line. 
These interspaces are white, each scale marked with a central 
spot of grayish brown. The posterior portion of the upper 
surface and sides of the head, including the parietal, the 
posterior tip of the frontal, the oculars, and most of the 
supralabials are blackish brown. The lower surfaces are 
white except where the dark bars involve the tips of the 
gastrosteges, or appear faintly on the urosteges. 
Wenipthmtopantis ese: ea even estes es 8 
Wenoth@ote tale 2mm ire Sn de 8 
Remarks.—This little snake resemblés C. cinctus, but 
lacks the reddish orange dorsal suffusion seen in that species, 
and the white cross-bands, instead of being unmarked, have 
each scale spotted centrally with dark brown. 
Distribution—This species is known from one specimen 
secured on Isla Partida, Espiritu Santo Island, Gulf of Cali- 
fornia, Mexico. 
