274 



COLTJBEIDJS. 



1. Helicops schistosus. 



Russell, Ind. Serp. ii. pi. iv. (1801). 



Coluber schistosus, Daud. Rept. vii. p. 132 (1803). 



Pseudoerj'X schistosus, Fitzing. N. Class. Sept. p. 55 (1826). 



Tropidonotus dimidiatus, Boie, Isis, 1827, p. 535. 



schistosus, Schleg. Phys. Serp. ii. p. 319 (1837) ; Cantor, 



Cat. Mai. Rept. p. 91 (1847) ; Bum. ^ Bibr. vii. p. 596 (1864). 



moestus, Cantor, Proc. Zool. See. 1839, p. 54. 



■ sui'gens, Cantor, I. e. 



Tropidophis schistosus, Gray, Cat. p. 69 (1849). 



Atretium schistosum, Giinth. Rept. Brit. Ind. p. 273 (1864) ; Theob. 



Cat. Rept. Brit. Ind. p. 179 (1876). 

 Helicops schistosus, Jan, Elenco, p. 76 (1863), and Icon. Oin. 28, 



pi. ii. fig. 3 (1868); Bouleng. Faun. Ind., Rept. p. 352 (1890). 

 Atretium schistosum, -var. yunnanensis, Anders. An. Zool. Res. 



Yunnan, p. 822 (1879). 



Eye moderate; rostral just visible from above, forming a narrow 

 suture with the internasal ; frontal nearly twice as long as broad, 

 much longer than its distance from the end of the snout, shorter 

 than the parietals ; loreal deeper than long ; one prseooular ; two 

 or three postoculars ; temporals 2 + 2 ; eight or nine upper labials, 

 third and fourth or fourth and fifth entering the eye ; four or five 

 lower labials in contact with the anterior chin-shields, which are 

 shorter than the posterior. Scales more or less distinctly keeled, in 

 19 rows. Ventrals 129-151 ; anal divided ; subcaudals 55-85. 

 Olive-brown above, uniform or with two series of small black spots 

 along the back ; a more or less distinct dark lateral streak ; upper 

 lip, outer row of scales, and lower surfaces yellowish. 



Total length 750 millim. ; tail 180. 



Southern India and Ceylon, Bengal, Burma, Yunnan, Malay 

 Peninsula. 



a. 2 (V. 148 ; C. 68). 

 b-d. 5 (V. 150, 151, 149 ; 



C. 69, 53, ?). 

 e-f,g. 6 (V. 129; C. 67) 



&yg. (V.137,134; C. 



55, 56). 

 h.Yg. (V. 132; C. 74). 

 i. § (V. 140 ; C. 67). 

 k. ? (V. 142; C. 67). 

 l-m. c? (V. 139, 138; 



C. 85, 82). 

 n. d (V. 136 ; C. 77). 



India. 

 Madras. 



Wynad. 



Anamallays. 

 Ceylon. 

 Ceylon. 

 Ceylon. 



Pinang. 



Dr. P. Kussell. 



T. 0. Jerdon, Esq. [P.]. 



Col. Beddome [C.]. 



Col. Beddome [0.]. 



R. Templeton, Esq. [P.]. 



Sir E. Tennent [PT]. 



Dr. Cantor. 



2. Helicops bicolor. 



. Limnophis bicolor, Giinth. Ann. Sf Mag. N. S. (3) xv. 1865, p. QQ, 

 pi. ii. fig. C ; Socage, Jorn. 8c. Lisb. i. 1866, p. 68 ; Steindachn. 

 Novara, Rept. p. 67 (1869). 



Eye moderate ; rostral just visible from above, forming a narrow 

 suture with the internasal ; frontal nearly twice as long as broad, 

 as long as or longer than its distance from the end of the snout. 



