Both Mr. Darwin and Mr. Waterton, if we remember rightly, have borne similar testimony in favor of the opinion that the vampire does suck blood. A servant of the former gentleman, when near Coquimbo, in Chili, observed something attached to the withers of one of his horses, which was restless, and on putting his hand upon the place he secured a vampire bat. Mr. Waterton, however, could not induce the vampires to bite him, notwithstanding the now veteran naturalist [Footnote 28] slept many months in an open loft which the vampires frequented; but an Indian boy who slept near him had his toes often "tapped," while fowls were destroyed, and even an unfortunate donkey was much persecuted, looking, as Mr. Waterton says, "like misery steeped in vinegar." [Footnote 28: Since this article was in type this excellent naturalist and kind-hearted gentleman has passed away from amongst us.] While at Villa Nova, on the lower Amazons, our naturalist was subjected to another annoyance, in the shape of ticks. The tracts thereabouts "swarmed with carapátos, ugly ticks, belonging to the genus _Ixodes_, which mount to the tops of the blades of grass, and attach themselves to the clothes of passers-by. They are a great annoyance. It occupied me a full hour to pick them off my flesh after my diurnal ramble." Mr. Bates's stay at Ega, on the upper Amazons, and his expeditions in search of scarlet-faced monkeys, owl-faced night-apes, marmosets, curl-crested toucans, blind ants, and hundreds of other interesting animals, must have been particularly enjoyable, if we except the presence of an abominable gad-fly, which fixes on the flesh of man as breeding-places for its grub, and causes painful tumors. "Ega was a fine field for a natural history collector," and Mr. Bates ticketed with the name of this town more than 3,000 new species of animals.