Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] ELEMENTARY ENTOMOLOGY The sides of the tray are made of light six-inch boards, and the bottom is formed by a piece of cheesecloth. Four-inch strips are next tacked to the top of the tray, so that they project inward around it. The inside of the projecting ledge formed by the four- inch strips is coated with tanglefoot. The food and the larvae are placed in the tray on the cheesecloth. The larvae are easily ob- served all the time, and the food material may be quickly changed, while the tanglefoot preven
Elementary entomology ([c1912]) Elementary entomology elementaryentomo00sand Year: [c1912] ELEMENTARY ENTOMOLOGY The sides of the tray are made of light six-inch boards, and the bottom is formed by a piece of cheesecloth. Four-inch strips are next tacked to the top of the tray, so that they project inward around it. The inside of the projecting ledge formed by the four- inch strips is coated with tanglefoot. The food and the larvae are placed in the tray on the cheesecloth. The larvae are easily ob- served all the time, and the food material may be quickly changed, while the tanglefoot prevents the escape of the larvae. The larvae, however, are not protected from parasites, and the pupae must be removed and placed in tight cages before the adults emerge. Aquatic larvae and nymphs may be reared in any suitable aquarium (Fig. 495), but only larvae of the same size should be kept together, and care should be taken to separate those which are predacious upon one another. Numerous cages for the study of special insects have been devised, as the Comstock root-cage, devices for studying the life history of ants, the limb cage for rearing insects out of doors in their natural habitat, and the breeding cage for parasites (Fig. 496). For further methods, consult the following books : L. O. Howard, The Insect Book. (Doubleday, Page & Co.) W. J. Holland, The Moth Book. (Doubleday, Page & Co.) V. L. Kellogg, American Insects. (Henry Holt and Company) J. H. and A. B. Comstock, Insect Life. (D. Appleton & Co.) FIG. 496. Breeding cage for parasites (After Banks)
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