According to Tschudi, the cucaracha and chilicabra--two large species of the cockroach--infest Peru in such numbers as almost to reduce the inhabitants to despair. Greedy, bold, cunning, they force their way into every hut, devour the stores, destroy the clothes, intrude into the beds and dishes, and defy every means that is resorted to for their destruction. Fortunately, they are held in check by many formidable enemies, particularly by a small ant, and a pretty little bird (_Troglodytes audax_) belonging to the wagtail family, which has some difficulty in mastering the larger cockroaches. It first of all bites off their head, and then devours their body, with the exception of their membranaceous wings. After having finished his repast, the bird hops upon the nearest bush, and there begins his song of triumph. Many other insect plagues might be added to the list, but those I have already enumerated suffice to reconcile us to our misty climate, and to diminish our longing for the palm groves of the torrid zone. Rivalling the mosquitoes in the art of tormenting man, and perhaps even surpassing them in numbers, the equatorial ants may truly be said to hold a despotic sway over the forest and the savannah, over the thicket and the field. It is hardly possible to penetrate into a tropical wood without being reminded, by their stings and bites, that they consider the visit as an intrusion, while they themselves unceremoniously invade the dwellings of man, and lay ruinous contributions on his stores. The inconceivable number of their species defies the memory of the naturalist, to whom many are even still entirely unknown. From almost microscopical size to an inch in length, of all colours and shades between yellow, red, brown, and black, of the most varied habits and stations, the ants of a single tropical land would furnish study for years to a zealous entomologist. Every family of plants has its peculiar species, and many trees are even the exclusive dwelling-place of some ant nowhere else to be found. In the scathes of leaves, in the corollas of flowers, in buds and blossoms, over and under the earth, in and out of doors, one meets these ubiquitous little creatures, which are undoubtedly one of the great plagues of the torrid zone.