. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 4o8 ECONOMIC ZOOLOGY AND ENTOMOLOGY In California millions of living ladybird-beetles are gathered each winter, while hibernating in great masses in the high Sierras, and as soon as the aphids begin to appear in destructive numbers in the melon fields and other places large shipments of the beetles are sent to the infested regions. The larva? of the lace-winged-flies and the syrphus-flies are also great enemies of aphis and other soft-bodied insects. The predaceous ground-beetles (family Carabidce) and the tiger-b
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 4o8 ECONOMIC ZOOLOGY AND ENTOMOLOGY In California millions of living ladybird-beetles are gathered each winter, while hibernating in great masses in the high Sierras, and as soon as the aphids begin to appear in destructive numbers in the melon fields and other places large shipments of the beetles are sent to the infested regions. The larva? of the lace-winged-flies and the syrphus-flies are also great enemies of aphis and other soft-bodied insects. The predaceous ground-beetles (family Carabidce) and the tiger-beetles (family CincindeHdee] destroy many larva? and. FIG. 190.—The fluted scale, Icerya purchasi, attacked by the Australian ladybird-beetle, Nomus cardinalis. In the lower left-hand corner, a Novius which has just issued from its pupal case. (Upper figure slightly enlarged; lower figure much enlarged.) adult insects that can be captured on the ground. The assassin-bugs (family Redumida) are all predaceous, as are several other kinds of Hemiptera. We have already called attention to the importance of dragon-flies in controlling mosquitoes. Among the parasitic insects the tachina-flies (family Tachinidce) rank high as enemies of various kinds of caterpillars. The eggs are usually laid on the body of the insect into which the young make their way as soon as they are hatched. Here they feed, often without destroying the host until it pupates. Sometimes the eggs of the tachina-flies are laid on the leaves,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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