Fig. 9 represents a longitudinal section of one of the stages in its place, with the ends of the two next; 1, showing the cardboard stage; 2, the cotton-wool; 3, the sliding partition; and 4, the horizontal slip of cardboard to carry the label. Fig. 10 represents one of the drawers on Mr. Salvin's plan: it is divided into three parts (1, 2, 3) by fixed partitions. No. 1 is represented empty; No. 2 with the specimens arranged; No. 3 with two stages and two of the movable partitions. This may appear very complicated at first sight, but a few trials will be sufficient to master the details, and the result will be very beautiful if neatly carried out. The eggs are well shown, not liable to fall out of their places, and it is very little trouble to alter the arrangement, every part being movable. Each drawer should be covered by a sheet of glass to exclude dust. Mr. Salvin's cabinet is an excellent one for holding the nests of birds, which should be removed with as little damage as possible, and placed in the drawers, under cover of glass. Great care must be taken to keep them free from moth, to which they are very liable; for this purpose they should be dressed with the solution of corrosive sublimate. The young collector should remember that what is worth doing at all is worth doing well, and that the care bestowed upon his cabinet is not labour in vain; habits of exactness and precision of arrangement are absolutely necessary if he would make the best use of the materials which come in his way; and, above all, never let him degenerate into the mere collector: his collection should be for use, and not merely ornamental. IV. BUTTERFLIES AND MOTHS. By Dr. Henry Knaggs. The collector of Lepidoptera who aspires to success must read the book of nature as he runs. If he have not the wit to note and turn to account each little fact which may come under his observation, neither he nor science will be the better for his collecting. He should, whenever he makes a capture, _know the reason why_, or he will never make a successful hunter. He should be ever on the alert: his motto, _nunquam dormio_. Some collect for profit, others for pastime; but the aim of our readers, I take it, is not only to acquire a collection of really good specimens, but also at the same time to improve their minds; and the best way of effecting this purpose is to hunt the perfect insect, not so much for itself as for the sake of the golden eggs, which, with proper care and attention, will in due course yield the most satisfactory results in the shape of bred specimens. This being the case, and space being limited, it seems best to simply touch upon the preliminary stages of insect existence, pointing out as we go those methods of collecting and preserving which experience has shown to be the most successful.