274 COLUBEIl)^. 



1. Helicops schistosus. 



lititisell, hid. Serp. ii. pi. iv. (1801). 



Coluber schistosus, Baud. JRept. vii. p. 13:2 (1803). 



Pseudoeryx schistosus, Fitziny. N. Class. JRept. p. 55 (1826). 



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



schistosus, Schleg. Pht/s. Serp. ii. p. 310 (1837); Cantor, 



Cat. Mai. liept. p. 91 (1847) ; Bum. <^ Bihr. vii. p. 596 (1854). 



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



surgens, Cajitor, I. c. 



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



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



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

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



pi. ii. iig. 3 (1868); Bouleny. Faun. Ind., Rept. p. 352 (1890). 

 Atretium schistosum, var. yuunanensis, Anders. An. Zool. Res. 



Yumian, 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 praeocular ; 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). India. Dr. P. Russell. 



b-d. $ (V. 150, 151, 140 ; Madras. T. 0. Jerdon, Esq. [P.]. 



C. 69, 53, ?). 



a-f, V- cT (V. 129 ; C. 67) Wynad. Col. Beddome [0.]. 



■&yg. (V. 137, 134; C. 



55,' 56). 



h. Yg. (V. 132; C. 74). Anamallays. Col. Beddome [C.]. 



i. ? (V. 140 ; C. 67). Ceylou. Pt. Templeton, Esq. [P.], 



h. $ (V. 142 ; C. 67). Ceylon. Sir E. Teuuent fP.]. 



/-?». c? (V. 139, 138; Ceylon. 



C. 85, 82). 



n. S (V. 136; C. 77). Piuang. Dr. Cantor. 



2. Helicops bicolor. 



Limnophis bicolor, Gi'mth. Ann. S,- May. N. H. (3) xv. 1865, p. 96, 

 pi. ii. fig. C ; Bocaye, Jorn. Sc. Lisb. i. 1866, p. 68 ; Steindachn. 

 Novara, Rcjjt. 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, 



