fully as much terror attaches, in the country districts, to the puff adder or sand viper as to the rattlesnake or copperhead. this is a suggestive bit of superstition, since there's no such thing as an adder or viper on the western hemisphere and never has been one, unless it came, carefully pickled, in a jar. what passes for the supposedly deadly reptile is the common hog-nosed or bull snake. it is about as dangerous as an infuriated rabbit. but it puts up one of the best "bluffs" known to natural history. when caught at its favorite occupation of basking in the open, without convenient avenue of escape, it flattens its head, and strikes right and left, blowing and hissing with an aspect much more terrifying than that of the truly venomous species. then, when the objects of its fury have taken to trees or adjacent fences, it glides quietly away into the grass and effaces itself. any one who has the nerve to look it between the eyes may uncover its pretense. for by this token may be known the real crotalids from the mock: a small but distinct pit between eye and nostril. lacking this mark, no ventral crawler in the land of the free need cause a flutter in the most timid breast, with one notable exception.