. An annotated list of the important North American forest insects. Forest insects. PROTECTION OF LOG CABINS, ETC., FROM INSECTS 3 through the outer bark to its soft inner portion, called the phloem, where they make tunnels of various types, along the sides of which they lay their eggs. (Fig. 2.) It is while the beetles are boring through the bark and constructing their tunnels that they push out to the entrances the fine brownish-white sawdustlike particles, or frass, which falls on the wood below and attracts attention by its unsightly appearance, and it is this tunneling that causes the bar
. An annotated list of the important North American forest insects. Forest insects. PROTECTION OF LOG CABINS, ETC., FROM INSECTS 3 through the outer bark to its soft inner portion, called the phloem, where they make tunnels of various types, along the sides of which they lay their eggs. (Fig. 2.) It is while the beetles are boring through the bark and constructing their tunnels that they push out to the entrances the fine brownish-white sawdustlike particles, or frass, which falls on the wood below and attracts attention by its unsightly appearance, and it is this tunneling that causes the bark. Figure 2.—Tunupls of adults and larval galleries of a bark beetle, Leperisinus aculcatus Sav. beneath the bark of ash. Natural size. The frass that was in the galleries of this species adhered to the bark when it was removed to loosen and fall off. The piles of frass on a log enable one readily to detect the presence of bark beetles within it. The larvae or grubs are tiny, whitish, cylindrical, slightly curved, legless creatures. (Fig. 3.) Upon hatching from the eggs, they extend their mines in all directions, quite often at right angles to the original (parent) tunnel, thereby aiding in the loosening of the bark. The galleries often contain "borings or frass. This depends upon the species of bark 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 Craighead, Frank C. (Frank Cooper), 1890-; Perry, George S; Snyder, Thomas Elliott, b. 1885; Hopkins, A. D. (Andrew Delmar), 1857-1948; MacAloney, Harvey John, 1896-; Graham, Samuel Alexander, 1891-; Peirson, Henry Byron, 1894-; Herrick, Glenn W. (Glenn Washington), 1870-1965; Britton, Wilton Everett, 1868-1939; Tanaka, T; Sanders, J. G; Howard, L. O. (Leland Ossian), 1857-1950; Chittenden, F. H. (Frank Hurlbut), 1858-1929; St. George, R. A. (Raymon
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
