For the small kinds, it is better not to fix them in this manner, and to preserve those whose shell is hard enough, the coleopters and the most part of hemipters, for example, it is sufficient to place them in little bottles or in flacks full of rolls of paper (or even cotton, if paper is wanting). This way is even applicable to the great kinds and should be employed when there is not time to impale with care the insects that are caught. The small kinds with soft shells should be preserved in alcohol for drying frequently deforms them to such a degree that they cannot be recognised. It is, also, in this liquor that the caterpillars should be preserved, as well as other larvae, and it would be well to place with them a certain number of dried insects so that a part might be taken for anatomical researches. Butterflies are taken by the aid of a gauze net or pocket. The insects are found chiefly in fields whose flowrs abound and on the leaves of trees; but they must be sought too in dark places, for, during the day, the night kinds are here asleep upon walls or the bark of trees. With a little skill, they can be pierced without seizing them before hand, and if there is fear of missing them thus, they should be covered whith the gauze pinews, through which the pin can be passed. When the air is calm and the night obscure, they can be easily taken by means of torches, for it is sufficient to place a light in a low and open place to attract a multitude of phalenes and other nocturnal insects. But to have handsome lepidopters, it is best to obtain caterpillars, feed them with the leaves of the plant on which they are found, and pierce the butterfly as soon as he has undergone his change, for the specimens caught in their flight are rarely fresh. For the coleopters, it is not sufficient to beat the bushes and herbaceous plants, these insects should, also, be sought under the bark of trees, in the interior of mushrooms, under the stones and even in the soil: for this, it is well to be provided with a paring-knife, an instrument which is much like a carpenter's chisel, but which is slightly curved, and ends in a kind of pointed spatula. Aquatic insects are taken by the help of a net like that used for insects of the air, but whose bag should be of canvass instead of cloth. In fine, to catch the hymenopters, whose sting is often formidable, it is necessary to have a pincers whose prongs are disposed like rackets and armed with coarse lace.