large sea-bladder floating on the surface; here we also caught with our net a new species of small _Hyaloea_, and of the fin-footed _Steira_, which approaches the nearest to the _Limacina_. Brazil has lately been visited by eminent naturalists, who have spent years in the country, and have travelled through it in every direction; we are therefore bound to suppress the few detached observations we were able to make during the short space of four weeks. Captain Von Kotzebue having frequently sent his people to fish in the Bay of Boto Fogo, we enriched our collection by thirty-two kinds of fish, the greater part of which were very similar to those already described as tenants of the Atlantic, but still differing from them in some respects. How abundant the insects of Brazil are is generally known, particularly in the warm and moist lands along the coast, in the vicinity of Rio Janeiro. Few of them crawl on the ground; the greater part of them live on the leaves and fruits, or under the bark of trees, in flowers, and in the spongy excrescences of the trees. Among the coleoptera, the _Stachylinus_ is a rarity: the white-winged _Cicindela nivea_ of Kirby is to be found in great abundance on the sand of the beach, which is of the same colour as itself; the _Cic. nodicornis_ and _angusticollis Dej._ on the other hand, frequent the paths in the forests. _Cosnania_, which supplies the place of our _Elaphrus_, is found among the grass by the side of brooks. The little animals of the _Plochionus_ and _Coptodera_ species climb, by means of their indented claws, along the moss on the trunks of the trees: their numbers, in these extensive forests, must be immense. Of the _Cantharis_, the number is small; the strongest of which is the _Cantharis flavipes_ F. the descriptions of which vary, so that it may still be doubted whether we have a correct account of it. To show the proportion of the numerous subdivisions which we observed in the different genera, it will be sufficient to give the numbers of those which we were able to collect during the short period of our stay:--these were, _Elater_, 37; _Lampyris_, 17; _Ateuchus_, 14 (including the _Deltachilum_ and _Eurysternus_); _Passalus_, 13; _Anoplognathidae_, 14; _Helops_, (including _Stenochia_ and _Statira_) 17; _Curculionidae_, 108; _Cerambycidae_, 101; _Cassida_, 24; _Haltica_, 26; _Doryphora_, 12; _Colaspis_, 15; and _Erotylus_, 12. The _Phanaeus_, according to MacLeay, distinguished by the total absence of claws from the feet, is peculiar to the warmer parts of America: _Onthophagus_ is not met with along the shore, but is found in the interior. Such large _Copris_ as are seen in the old world, (_Isidis_, _Hamadrias_, _Bucephalus_,) have not been discovered here: their place is supplied by the large _Phanaei_, _Faunus_, _bellicosus_, _lancifer_, &c. A golden-green _Copris_ is a great rarity. _Onitis_ seems to be quite wanting in America: all the specimens, in this part of the world, that