Appearance
Adults may attain a total length of 54 cm , which includes a tail 6.5 cm long.Dorsally, ''B. erythromelas'' is reddish brown, with a double series of black or dark brown triangular markings, which may be alternating or opposite. The head is dark brown on the top and sides, with some darker markings. Ventrally, it is yellowish, speckled with brown, and with dark spots extending from the sides of the ventrals onto the first two dorsal rows.
The strongly keeled dorsal scales are arranged in 21 rows at midbody. Ventrals 144-155; anal plate entire; subcaudals divided 33-35.
Naming
The specific name, ''erythromelas'', is from the Ancient Greek words έρυθρός '''', meaning "red", and μέλας '''', meaning "black", referring to this snakes coloration.Habitat
This species' common name refers to its habitat, the Caatinga, a large ecoregion in northeastern Brazil, which consists of xeric shrubland and thorn forest.References:
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