SNAKES. 131 



two of which are in contact with the oculars. Scales moderate, 

 rhomboid, in nineteen rows, smooth ; anal bifid. Above brown, 

 with two rows of darker rounded spots, confluent into cross bands 

 about the middle of body ; on the neck the five or six first spots 

 alternate with yellow ones ; beneath greyish, marbled with brown ; 

 a dark streak from the back edge of eye to the angle of mouth. 

 Posterior maxillary teeth longest, separated from the other ones 

 by an interval. Coloration not very variable. Length of cleft 

 of mouth |" ; length of tail 11"; total length 39". 



9. Dromicus triscalis. 



Coluber triscalis, Linn. Syst. Nat. i. p. 385 ; Lutr. Rept. iv. 

 p. 103; Baud. Rept. vi. p. 377. Dromicus triscalis, Bum. & 

 Bibr. p. 672 (?). 



Habit moderate. Scales smooth, in seventeen rows ; one lo- 

 real ; upper labials eight, fourth and fifth coming into the orbit. 

 Above brownish, anteriorly with three brown longitudinal stripes, 

 the medial one disappearing on the posterior part of trunk, the 

 outer ones confluent to a single one on the tail. 



a. Adult : discoloured. Paraguay. From Mr. Frank's Collec- 

 tion as Coluber rujiventer. 



10. Dromicus callil.ema. 



Natrix callikema, Gosse, A Naturalist's Sojourn in Jamaica. 

 p. 384. 



Small; habit moderate. Scales smooth, in nineteen rows; 

 one loreal ; seven upper labials, third and fourth coming into the 

 orbit. Brown, minutely speckled with black, sometimes with a 

 darker obsolete dorsal streak ; sides separated from back by a 

 darker streak; crown variegated with black; a brown streak 

 through the eye ; belly uniform whitish. Anal bifid. 



a. Adult : head injured. Jamaica ; Bluefields. From Mr. 



Gosse's Collection. The type of Mr. Gosse's description. 



b, c. Young. Bluefields. From Mr. Gosse's Collection. 



d. Adult. Jamaica. From Dr. Parnell's Collection. 



e. Adult. West Indies. From Mr. Scrivener's Collection 

 /. Adult. West Indies. 



g. Adult. West Indies. 



h. Half-grown. West Indies. 



i. Half-grown. West Indies. 



11. DROiMlCUS temminckii. 



Psammophis temminckii, Schley. Ess. pi. 8. f. 14, 15. Coro- 

 nella chamissonii, Wiegm. Nov. Act. 1835, t. 1.9. Orophis {Fitz.) 



