. Elementary entomology . FIG. 468. A water dip net FIG. 469. A small dip net (After Packard) (After Howard) closer to the bottom. The net itself should be made of fine brass- wire netting, about twelve inches in diameter and of about the same depth. Fig. 469 shows a dip net with a flange, or lip, of tin or sheet iron, which is useful in dislodging aquatic larvae or insects from around stones, thick weeds, etc. The sag net (Fig. 470). This form of aquatic net is described by Professor James G. Needham, \vho is probably our best authority on aquatic insects, as follows : It consists of a ring o
. Elementary entomology . FIG. 468. A water dip net FIG. 469. A small dip net (After Packard) (After Howard) closer to the bottom. The net itself should be made of fine brass- wire netting, about twelve inches in diameter and of about the same depth. Fig. 469 shows a dip net with a flange, or lip, of tin or sheet iron, which is useful in dislodging aquatic larvae or insects from around stones, thick weeds, etc. The sag net (Fig. 470). This form of aquatic net is described by Professor James G. Needham, \vho is probably our best authority on aquatic insects, as follows : It consists of a ring of stout spring wire three to four feet in diameter, to which is attached a very shallow bag of bobbinet, and at one side is a handle only long enough to be held readily. It is intended to catch insects adrift in the stream, and is accompanied by an instrument for dislodging them. Such an instrument is figured below the net. It consists of a handle three or
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