10. ANCISTRODON. 525 
above, with darker spots or cross-bars- with serrated edges ; one or 
two lateral series of dark spots; a dark spot on the snout, a pair 
of spots on the vertex, and two pairs of oblique streaks on the back 
of the head; a dark, light-edged band on the temple ; lips speckled 
with brown; lower parts whitish, more or less speckled with grey 
or brown. 
Total length 490 millim. ; tail 65, 
From the borders of the Caspian Sea and the Ural River to the 
Upper Yenisei. 
a, 3 (V. 155; C. 37). Mangyschlak. St. Petersburg Mus. [E.]. 
b. 2 (V. 160; C. 38). Anan, Mazandaran, W. T. Blanford, Esq. 
Elburz Mts. (E.]. 
ce. fo (V.154; C. 40). Ai Dara, Transcaspia. M. Eylandt [C.]. 
d. 3 (V. 151; C. 38). Varnoe, E. Turkestan. St. Petersburg Mus. [E.]. 
6. Ancistrodon intermedius. 
Trigonocephalus blomhoffii, part., Schleg. Phys. Serp. ii. p. 552 
(1837), and Faun. Japon., Amph. p. 88 (1838). 
—— intermedius, Strauch, Trans, Assoc. Russ. Nat. i. Zool. (Russian), 
p. 295 (1868), Schl. Russ. R. p. 246 (1873), and Voy. Przewalski, 
Rept. p. 52 (1876). 
Halys intermedia, Peters, Mon, Berl. Ac. 1877, p. 736. 
Ancistrodon intermedius, Bouleng. Ann. §& Mag. N. H. (6) v. 1890, 
p. 140. 
Agrees in most respects with A. halys, but the snout is not at all 
turned up at the end, as in A. blomhoffii. 
Total length 750 millim.; tail 85. 
Central Asia, Eastern Siberia, Mongolia, and Japan. 
a. Hgr. (V. 161; C. 49). Kunges, R. Ili, E. St. Petersburg Mus. [E.}. 
Turkestan. 
b. 2 (V. 166; C. 45). Smeinogorsk,Gov. Dr. O. Finsch [C.]. 
Tomsk. 
e-d. g (V. 155,156; C. ‘Chabarowka, Hr. Dorries [C.]. 
40, 40). Ussuri R. 
e. 9 (V. 158; C. 39). Ussuri R. - Warsaw Mus. [E.]. 
J-g. Hgr. (V. 157,164; Tarim R. near St. George Littledale, 
C. 42, 44). Lob Nor. Esq. [P.]. - 
7. Ancistrodon blomhoffii. 
Trigonocephalus blomhoffii, Bote, Isis, 1826, p. 214; Gray, Cat. 
p. 14 (1849); Dum. & Bibr. vii. p. 1496 (1854); Strauch, Schi. 
Russ. R. p. 251 (1873), and Voy. Previa tots Rept. p. 52 (1876). 
blomhoffii, part., Schleg. Phys. Serp. ii. p. 552, pl. xx. figs. 8 & 
9 (1837), and Faun. Japon., Amph. p. 88, pl. vi. (1838). 
atfinis, Gray, 1. c. 
Ta ee var. megaspilus, Cope, Proc. Ac. Philad. 1859, 
p. 336. 
Halys blomhoffii, Giinth. Rept. Brit. Ind. p. 393 (1864). 
Serie yas blomhoffii, Bouleng. Ann. §& Mag. N. H. (6) v. 1890, 
- p. 140, 
