The Crotalinæ consist of only two genera:—
(e) Ancistrodon. (f) Lachesis.
1.—VIPERINÆ.
(a) Vipera.
We shall not recapitulate here the characters of the Genus Vipera, which we described in dealing with the vipers of Europe. The genus is represented by several species, the geographical range of which is chiefly confined to Eastern and Central Asia.
(1) Vipera renardi.—Resembles V. berus, but the snout is pointed and soft, with a turned-up tip; a single series of scales between the eyes and the lips; nostril pierced in the lower half of a single nasal shield; 8-9 supralabial shields; 4 infralabials. Body scales in 21 rows; 130-150 ventrals; 24-37 subcaudals.
Coloration the same as in the European V. ursinii, but the snout and lips are spotted with black or brown.
Total length, 395-620 millimetres; tail 40-75.
Habitat: Central Asia, Turkestan.