28. COLUBER 



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 J lateral scales of second, third, and often first, 

 rows with central brown lines j gastrosteges 196 to 

 207, urosteges 128 to 138. 



C. semilineatus. — p. 675. 



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. 



'. — Scales in fifteen rows. 



C. t. taeniatus.— 685. 



