. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. 74 ZOOLOGY do the latter multiply that were it not for the voracious larvae of the ladybird, most plants would be destroyed in a single season. The larvae of the ladybirds are dark, spotted, and hairy. The elytra of the imago are in most species reddish in color. The list of beetles directlj' or indirectly useful to man is small. The carrion- beetles, tuml)le-bugs, and rove-beetles, which feed upon decaying animal and vegetable matter, are useful as scavengers. Of those which serve us bj^ killing other inse
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. 74 ZOOLOGY do the latter multiply that were it not for the voracious larvae of the ladybird, most plants would be destroyed in a single season. The larvae of the ladybirds are dark, spotted, and hairy. The elytra of the imago are in most species reddish in color. The list of beetles directlj' or indirectly useful to man is small. The carrion- beetles, tuml)le-bugs, and rove-beetles, which feed upon decaying animal and vegetable matter, are useful as scavengers. Of those which serve us bj^ killing other insects injurious to vegetation, the lady- bird beetle stands first. The economic importance to us of this one familj' can hardly be estimated. Different kinds of ladybirds feed on different species of in- sects. At one time it seemed that the orange industry, if not that of fruits in general, was doomed in California on ac- count of the destruction wrought l:)y the introduction of a scale-insect. As the insect had been imported, we had no native beetle which attacked. Search was made abroad, and a ladj'liird beetle was found in Australia which feeds on this particular scale-insect. The Austrahan beetle was intro- duced into California, and now the scale-insect is subdued. The larvae of some of the checkered beetles ^ feed upon the larvffi of boring beetles, while the larvae of tiger-beetles watch. Fig. si.—Cyllfiic robi nee, locust borer. ' A family of rather small beetles, living in flowers and on trees, and often with contrasting 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 Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
