28. COLUBER 659 



c'. Gastrosteges more than 185} urosteges not fewer 

 than 93. 



d. Not from Clarion Island. 



Coluber flagellum piceus. p. 664. 



d*. Clarion Island only. 



Coluber anthonyi. p. 673. 



b". Distinct longitudinal lines present on sides of body, 



no dark cross-bars on back of neck. 



cc. Two lateral light stripes anteriorly, not continued to 

 tail; lateral scales of second, third, and often first, 

 rows with central brown lines; gastrosteges 196 to 

 207, urosteges 128 to 138. 



C. semilineatus. p. 67$. 



cc'. A single light yellow or white line along scales of 

 third and fourth lateral rows; lateral scales without 

 central brown lines. 



dd. Lateral light line not broken anteriorly. 

 e. Lateral light line yellowish, of uniform width 

 from neck to tail ; dark markings present on lips, 

 chin and throat. 



C. lateralis. p. 678. 



e'. Lateral light line pure white, with slight en- 

 largements at intervals of from four to seven 

 scales; no dark markings on lips, chin and 

 throat. 



C. barbouri. p. 681. 



dd'. Lateral light line yellowish, broken up anteri- 

 orly, absent or indefinite posteriorly. 

 C. aurigulus p. 683. 



a*. Scales in fifteen rows. 



C. t. taeniatus. 685. 



