. The external and internal parasites of [man and] domestic animals. egs under the abdomen. Most of theinsects of this order are injurious to vegetation. lY. Coleoptera (shield-wings). Insects of this order areknown as beetles, weevils, etc. The front wings are thick-ened and stiff, not used in flight, but serve to protect thehinder wings, which are larger and thin, and can be folded upand tiicked away under them. The mandibles and maxillaeare both used as jaws for biting and chewing. The larvaehave usually three pair of legs, and many are well known asgrubs and borers in wood. The apple-tree
. The external and internal parasites of [man and] domestic animals. egs under the abdomen. Most of theinsects of this order are injurious to vegetation. lY. Coleoptera (shield-wings). Insects of this order areknown as beetles, weevils, etc. The front wings are thick-ened and stiff, not used in flight, but serve to protect thehinder wings, which are larger and thin, and can be folded upand tiicked away under them. The mandibles and maxillaeare both used as jaws for biting and chewing. The larvaehave usually three pair of legs, and many are well known asgrubs and borers in wood. The apple-tree borer (figure 12),is an example. This great order includes many beneficialcarnivorous insects, as well as many that are injurious tovegetation. y. Hemiptera (half-wings). This order embraces those Figure 11.—Southern Army-worm (Leucama) imago; and larva, a, naturalsize. From Packards Guide, after Glover. PARASITES OF ANIMALS. 9 insects properly called bugs, such as the squash-bug (figure13), strawberry-bug, bed-bug, and also the cicada or seven- Fig. 12, Fis. 13.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectparasit, bookyear1870
