Page:Popular Science Monthly Volume 55.djvu/208

196 in a manner that will make a dog leap back in affright. It has no goiter-bag, but the skin of its throat is elastic, and can be made to swell out like that of the East Indian cobra, while its multiplex spines vibrate ominously. The little monster is, nevertheless, one of the most harmless reptiles of the tropics, and subsists on succulent leaves, with occasional entremets of small grubs and insects. In that case, however, Nature has rather overdone its efforts at protective ugliness, and the Creoles kill the poor simulator of terrors as the Mexican rustics would a horned toad.

A plurality of the zoölogical immigrants of the West Indies seem to have come from Mexico, and it is a suggestive fact that the number of reptiles steadily decreases from west to east. Cuba, with its western headland approaching the east coast of Yucatan, thus came in for a lion's share of lizards, tortoises, and ophidians.

Hayti, though only one fourth smaller, experienced a seventy-five-per-cent discount, and all natives and travelers agree on the curiosum that there is not a single species of serpent on the island of Porto Rico. Trinidad, with an area of only fifteen hundred square miles, but laved by the giant current of the Orinoco, boasts twenty-eight species of land serpents, besides several pythons and swamp vipers. The Trinidad museum of venomous ophidians does not, however, include the dreaded fer-de-lance, which infests the woods near Samana Bay on the south coast of San Domingo. The Bothrops lanceolatus is larger than a rattlesnake, and its bite, though not always fatal, causes fearful inflammation, but its aggressive disposition has been greatly exaggerated. Like most venomous serpents, it is a sluggish brute, relying on its ability to crouch motionless till its prey comes in range, then get in a snap bite and shrink back to wait till the virus begins to take effect, and the victim, in its fever spasms, betrays its helplessness by those eccentricities of conduct which are apt to be misinterpreted by the dupes of the "serpent-charm" superstition.

The fer-de-lance is found also on the islands of Martinique and Santa Lucia, where the natives counteract its virus with a decoction of jungle hemlock, and the basis of its grewsome reputation seems to be the fact that it does not warn the intruders of its haunts, after the manner of the cobra or the rattlesnake, but flattens its coils and, with slightly vibrating tail, awaits events. If the unsuspecting traveler should show no sign of hostile intent he may be allowed to pass unharmed within two yards of the coiled matador, but a closer approach is apt to be construed as a challenge, and the vivoron, suddenly rearing its ugly head, may scare the trespasser into some motion of self-defense—he may lift his foot or brandish his stick in a menacing manner. If he does he is lost. The lower coils will expand,