. An annotated list of the important North American forest insects. Forest insects. PROTECTION OF LOG CABINS, ETC., FROM INSECTS SEASONAL ACTIVITY OF THE INSECTS 11 Some, at least, of the insects of the kinds previously mentioned are at work during the entire growing season, which lasts from April. FiGCEE 15.—Piece of log with bark removed to show eggs of white painted hiclii>ry borer, Cylhne caryae, which were inserted through crevices. Enlarged 3i,^ diameters to October in the vicinity of Washington, D. C, from February to December in the extreme Southern States, and from May to Septem- b
. An annotated list of the important North American forest insects. Forest insects. PROTECTION OF LOG CABINS, ETC., FROM INSECTS SEASONAL ACTIVITY OF THE INSECTS 11 Some, at least, of the insects of the kinds previously mentioned are at work during the entire growing season, which lasts from April. FiGCEE 15.—Piece of log with bark removed to show eggs of white painted hiclii>ry borer, Cylhne caryae, which were inserted through crevices. Enlarged 3i,^ diameters to October in the vicinity of Washington, D. C, from February to December in the extreme Southern States, and from May to Septem- ber in the Northeastern States. During this time beetles are ac- tive, looking for favorable woods on which to lay their eggs. During the rest of the year, however, certain species of these insects are relatively inactive and only a very few or no adult beetles are present. The bark beetles and ambrosia beetles are active throughout nearly the entire period within the months specified although their numbers vary a great deal within the season of ac- tivity. Insects of both the bark-beetle and ambrosia-beetle types mature very rapidly and can develop from the egg to the adult stage in from foui- to six weeks. They may have as many as three and often five generations a j^ear in certain parts of the 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. (Raymond Alexander
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
