.'5-51 COLCBRID.S. 



equal to its distance from the mouth ; five or six upper labials, 

 third and fourth entering the eye; symphysial in contact with tin- 

 anterior chin-shields ; posterior chin-shields in contact or separated. 

 13 rows of scales. Ventrals 153-210; anal entire; subcaudals 

 1 "> I'O. Tail ending in a point. Dark brown or black above ; 

 beneath yellowish, with or without large black transverse spots or 

 cross bands, or uniform blackish brown. 



Total length 410 millim. ; tail 33. 



Sumatra, Borneo, Java, Moluccas. 



A. Head yellow; body with transverse series of small yellowish 



spots ; belly with large black spots or cross bands. 



a. 9. (V. 164 ; C. 20). Sarawak. Sir J. Brooke ) , T 



[P.]. / t 1 ^ )es . f 



b. Hgr. (V. 153; C. 20). Borneo. A.R.Wallace, f 



Esq. [P.]. J C( T S - 



B. Head yellow, with a black lateral streak, passing through the eye ; 



above with yellowish cross bars disposed regularly, each of 

 which in the middle expands into a longitudinally oval spot ; 

 belly barred black and yellow, the yellow bars confluent with 

 the dorsals. 



a. Hgr. (V. 184; C. 26). Mt. Batu-Song, C. Hose, Esq. [C.] 

 Sarawak, 1000 ft. 



C. Head yellow above, entirely or partially ; body without spots ; 



belly with black cross bands. 



a. <$ (V. 154 ; C. 25). Borneo. A. R. Wallace, Esq. [P.]. 



b. <j> (V. 169; C.18). Borneo. 



c. Yg. (V. 193 ; C. 22). Sumatra. Dr. Bleeker. (Type of 



C. melanorhynchus.) 



d. Hgr. (V. 167 ; C. 20). E. coast of Suma- Mrs. Findlay [P.]. 



tra. 



D. Head uniform dark brown or black above, like the body ; belly 



with large black spots or cross bands. 



a. $ (V. 161 ; C. 20). Matang, Borneo. 



b <5 (V. 188; 0.24). Sumatra. Dr. Bleeker. 



(Type of C. alkeni.) 



c-d. c? (V. 163, 164 ; Padang, Sumatra. 

 C. 22, 22). 



e. (V. 194; C. 18). Java. C. Bowring, Esq. [P.]. 

 f -g. 3 (V. 162 ; 0. 23) Ternate. H.M.S. ' Challenger.' 



& $ (V. 183 ; C. 17). 



E. As in the preceding, but lower parts without or with mere traces 



of spots. 



a. Yg. (V. 202; C. 17). Java. Dr. Bleeker. (Type of 



C. dimidiatn.) 



b. Yg. (V. 210; C. 15). Java. Dr. Ploem [C.]. 



