684 13. COLUBRID^ 



The color above is dark brown, becoming black ante- 

 riorly. The head is light brown, shaded with yellow. A 

 narrow yellow streak runs from the eye to the snout. A 

 spot on the temporal region, one on the postoculars, all of 

 the labials, the chin, and the anterior part of the abdomen 

 are bright golden yellow, unspotted, as are also the sides 

 of the neck and the anterior fourth of the body up to the 

 fifth row of scales. On the second and third rows of scales 

 of the latter region is a broken black band interrupted at in- 

 tervals of about seven scales. This black band where pres- 

 ent forms the lower border of a yellow lateral stripe. It 

 finally becomes continuous, and with a band upon the first 

 row almost excludes the yellow ground color upon the mid- 

 dle and posterior parts of the body. The tendency of this 

 coloration is to produce two series of alternating yellow and 

 black spots along the anterior part of the sides. The belly 

 is dirty yellowish, unspotted. 



Length to anus 697 



Length of tail 3+8 



Distribution. — Only two specimens of this snake have 

 been collected. One was secured by John Xantus, at Cape 

 San Lucas, the other by Gustav Eisen, at San Jose del Cabo, 

 Lower California, Mexico. 



Remarks. — This racer is closely related to C. lateralis 

 and resembles it in coloration, but has the lateral stripe 

 broken anteriorly. 



