526 VIPEEID^. 



. Closely allied to A. halys, witli which it agrees in most respects, 

 but snout not turned up at the end, and scales more strongly keeled, 

 in 21 (exceptionally 23,— specs, h, g) roys. Upper labials con- 

 stantly 7. Ventrals 137-166; subcaudals 29-55. Coloration very 

 variable. Grey, brown, or red above, with large dark-edged spots 

 disposed in pairs, opposite or alternating, or more or less regular 

 dark cross-bands ; a dark, light-edged temporal band j upper lip 

 uniform yellowish or red ; belly yellowish or red, more or less pro- 

 fusely speckled or spotted with blackish, or nearly entirely black. 



Total length 720 millim. ; tail 100. 



Eastern Siberia, Mongolia, China, Japan, Siam. 



a. c? (V. 140 ; 0. 48). Japan. Leyden Museum. 



b-c. 2 (V. 145 ; C. 47) Yokohama. H.M.S. ' GhaUenger.' 



& hgi-. S (V. 142; 



C. 55). 



d. $ (V. 142 ; 0. 43). Okinawa, Loo Choo Mr. M. E. Eokugo 



Islands. [P.]. 



e-f, 9- 6 (V. 146 ; 0. Tsu Sima, Loo Ghoo Mr. Hoist [G.]. 



46), hgr. (V. 138 ; Islands. 



G. 44), & yg. (V. 



145 ; G. 45). 



^-«- d (V. 151, 146; Formosa. K.Swin]ioe,Esq.rC.]. 



G. 40,46). 



k-n. 5 (V. 142, 144 ; Hoi How, Hainan. J. Neumann, Esq. 



G. ?, 32) & yg. (V. [P.]. 



144, 141 ; G. 39, 32). 



o-p. S (V. 144, 144 ; Hang-Ghau, Prov. Ghe- J. J. Walker, Esq. 



0.41,36). Kiang. [P.]. 



q. ? (V. 140; G. 30). Ichang. A. Henry, Esq. [P.l. 



r. S (V. 143; 0.38). Ichang. E. Swinhoe, Esq.[C.^ 



s. 2 (V. 145; G. 31). Ichang. A. E. Pratt, Esq. "G.' 



t-u. 2 (V. 142, 138 ; Mountains N. of Kiu A. E.Pratt, Esq. 'G.' 



G. 32, 29). Kiang. 



V-1V. 2 (V. 138 ; G. Mountains N. of Kiu 0. Maries, Esq. TG.]. 



32) & yg. (V. 143 ; Kiang. 



0. 31). 



X. a (V. 137; 0. 46). ? Sir E. Belcher [P.]. 



(Type of T. affinis.) 



8. Ancistrodon Mmalayanus. 



Halys himalayanus, Gilnth. Sept. Brit. Ind. p. 393, pi. xxiv. fig. A 



(1864) ; Steindachn. Novara, Rept. p. 87 (1867) ; Stoliczka, Journ. 



As. Soo. Beng. xxxix. 1870, p. 226; Anders. Proc. Zool. Soc. 



1871, p. 196, and 1872, p. 401 ; Fayrer, TTianatoph. Ind. ])1. xvi. 



(1874) ; Theoh. Cat. Rept. Brit. Ind. p. 225 (1876; ; Blanf. Zool. 



Ind Yark. Miss., Rept. p. 24 (1878). 

 Trigonocephalus himalayanus, Straiich, Schl. Rztss. R. p. 234 (1873). 

 blomhoffii (non Boie), Jan, Icon. Gen. 46, pi. v. figs. 4 & 5 



(1874). 

 Ancistrodon himalayanus, Bouleng. Faun. Ind., Rept. p. 424, fiff. 



(1890). > 1 t > "^ 



Snout hardly turned up, with sharp canthus. Eostral as deep 

 as broad, or a little broader than deep ; a pair of internasals 



