. Elementary entomology. Insects. I 12 ELEMENTARY ENTOMOLOGY leap for some unwary midge or other small insect. They usually occur together in some numbers, and some kinds have been seen on the ocean hundreds of miles from land. All of the aquatic bugs are predacious upon other insects or upon small aquatic animals or fish, and may therefore be either beneficial or injurious, according to the nature of the FIG. 148. The wheel-bug (Prionidus cristatns Linn.), eggs, nymphs, and adults (After Glover, United States Department of Agriculture) The predacious bugs. Several terrestrial families
. Elementary entomology. Insects. I 12 ELEMENTARY ENTOMOLOGY leap for some unwary midge or other small insect. They usually occur together in some numbers, and some kinds have been seen on the ocean hundreds of miles from land. All of the aquatic bugs are predacious upon other insects or upon small aquatic animals or fish, and may therefore be either beneficial or injurious, according to the nature of the FIG. 148. The wheel-bug (Prionidus cristatns Linn.), eggs, nymphs, and adults (After Glover, United States Department of Agriculture) The predacious bugs. Several terrestrial families are predacious and may be conveniently considered together. The assassin-bugs (Rcthwiidae) are well named in this respect. They feed on soft- bodied insects, but unfortunately are not discriminating in their choice, so that frequently beneficial insects are destroyed in large numbers. They are more common in the South, where one of the largest species is known as the wheel-bug (Arilus cristatus] from the large hump, like a cogwheel, on the back. In the North are several species, commonly found around houses, one of which is. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882. Boston, New York [etc. ] Ginn and Company
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