_Labeling Collections._--I have already fully discussed the subject of labeling insects before placing them in their final resting place in the collection. In the collection certain additional labels are required, viz, labels for the order, family, subfamily, genus, species, and sometimes variety. The label for the order should be placed above the first species in the collection, and should be in large type, as should also be the name of the family, which is to be placed above the first species in the family. The genus label should be in prominent type, somewhat smaller than the family label, and should be placed at the head of the genus. Custom varies as to placing the label of the species. In my practice I have adopted the plan of placing the label below the series of specimens representing the species. Some entomologists reverse this plan and place the label above the series of specimens. Others recommend pinning the label to the first and best-determined specimen of the series. This has the advantage of always keeping the label with the species and preventing the danger of mistake or confusion of the latter. In the case of large insects, however, this plan has the disadvantage that the label can not be seen except by taking out the specimen, and, on the whole, the plan which I have adopted of placing the label below the series of specimens is preferable, but may be supplemented by the other, as in addition to the independent label, one of the specimens should have a label pinned with it. The labels should be neatly written on blanks printed for the purpose; but a better plan, perhaps, and one which I have followed, where possible, in labeling the national collection, is to cut the names neatly from a catalogue of the insects, which will furnish all the labels from order to species, and fasten them with short, inconspicuous pins in their proper places in the collection. Where it is not desired to keep the collection as compact as possible, or where one has limited space, I would advise labeling the species, not only with the recognized name, but also with the synonyms. This requires some space, and will hardly be followed except in public collections. It is also desirable to arrange together, and label as such, the varieties of any given species. The appearance of the collection will depend largely on the uniformity of the labeling, and too much care can not be exercised in this respect. MUSEUM PESTS, MOLD, ETC.