"At Cametá, I chanced to verify a fact relating to the habits of a large, hairy spider of the genus Mygale, in a manner worth recording. The individual was nearly two inches in length of body; but the legs expanded seven inches, and the entire body and legs were covered with coarse gray and reddish hairs. I was attracted by a movement of the monster on a tree-trunk: it was close beneath a deep crevice in the tree, across which was stretched a dense white web. The lower part of the web was broken; and two small birds, finches, were entangled in the pieces. They were about the size of the English siskin; and I judged the two to be male and female. One of them was quite dead; the other lay under the body of the spider, not quite dead, and was smeared with the filthy liquor, or saliva, exuded by the monster. I drove away the spider, and took the birds; but the second one soon died. The fact of a species of mygale sallying forth at night, mounting trees, and sucking the eggs and young of hummingbirds, has been recorded long ago by Madame Merian and Palisot de Beauvois; but, in the absence of any confirmation, it has come to be discredited. From the way the fact has been related, it would appear that it had been derived from the report of natives, and had not been witnessed by the narrators. I found the circumstance to be quite a novelty to the residents hereabouts. "The mygales are quite common insects. Some species make their cells under stones; others form artificial tunnels in the earth; and some build their dens in the thatch of houses. The natives call them crab-spiders. The hairs with which they are clothed come off when touched, and cause a peculiar and almost maddening irritation. The first specimen that I killed and prepared was handled incautiously; and I suffered terribly for three days afterward. I think this is not owing to any poisonous quality residing in the hairs, but to their being short and hard, and thus getting into the fine creases of the skin. Some mygales are of immense size. One day, I saw the children belonging to an Indian family who collected for me with one of these monsters, secured by a cord round its waist, by which they were leading it about the house as they would a dog." BATS.