houses are so small as to require a box-lid to fit very closely in order to keep them out. They are great enemies to any dead animal matter, especially insects and small birds. In drying the specimens of insects we procured, we found it necessary to hang up the boxes containing them to the roof of the verandah; but even then a party got possession by descending the string, as we caught them in the act, and found that in a few hours they had destroyed several fine insects. We were then informed that the Andiroba oil of the country, which is very bitter, would keep them away, and by well soaking the suspending string we have since been free from their incursions.
Having at first employed ourselves principally in collecting insects, I am enabled to say something about the other families of that numerous class. None of the orders of insects were so numerous as I expected, with the exception of the diurnal Lepidoptera, or butterflies; and even these, though the number of different species was very great, did not abound in individuals to the extent I had been led to anticipate. In about three weeks Mr. B. and myself had captured upwards of a hundred and fifty distinct species of butterfies. Among them were eight species of the handsome genus Papilio, and three Morphos, those splendid large metallic-blue butterflies which are always first noticed by travellers in South America, in which country alone they are found, and where, flying lazily along the paths in the forest, alternately in deep shade and bright sunshine, they present one of the most striking sights the insect world can produce. Among the smaller species the exquisite colouring and variety of marking is wonderful. The species seem inexhaustible, and probably not one-half of those which exist in this country are yet discovered. We did not fall in with any of the large and remarkable insects of South America, such as the rhinoceros or harlequin beetles, but saw numerous specimens of a large Mantis, or praying insect, and also several of the large Mygale, or bird-catching spiders, which are here improperly called "tarantulas," and are said to be very venomous. We found one which had a nest on a silk cotton-tree, formed like the web of some of our house-spiders, as a place of concealment, but of a very strong texture, almost like silk. Other species live in holes in the ground. Beetles and flies were generally very scarce, and, with few exceptions, of small size, but bees and wasps were abundant, and many of
