. An annotated list of the important North American forest insects. Forest insects. FiCURB 11. -Cross section of persimmon log, showing the wood destroyed by of the powder-iDost beetle Xyloblops hasilare. Natural size ;rubs The eggs are laid singly or in a mass on the bark or in crevices in the bark or wood. The larva is an elongate, depressed grub having a characteristic flat head often wider than the rest of the body. (Fig. 22.) The young borer mines the inner bark or the wood, making a flat- tened, oval, more or less tortuous mine or wormhole w h i c h, when completed, widens into a large p
. An annotated list of the important North American forest insects. Forest insects. FiCURB 11. -Cross section of persimmon log, showing the wood destroyed by of the powder-iDost beetle Xyloblops hasilare. Natural size ;rubs The eggs are laid singly or in a mass on the bark or in crevices in the bark or wood. The larva is an elongate, depressed grub having a characteristic flat head often wider than the rest of the body. (Fig. 22.) The young borer mines the inner bark or the wood, making a flat- tened, oval, more or less tortuous mine or wormhole w h i c h, when completed, widens into a large pupal or resting cell. This connects with the outer surface by a short, oval exit hole through which the new beetle emerges after the larva has transformed and matured in the pupal cell. The larval mines may be in either the bark or wood alone, or, as in many instances, extend throughout the entire piece,^- and are filled with tightl}^ packed sawdustlike material. (Fig. 23.). FiGUUE 12. — Criiss yi'ctinn ol' hickcjry haiuUe, showing damage causrd liy grubs of the pow- der-post beetle Xylohiu))x hasilure. Some of the tightly packed powderlike borings were removed from near the surface to show more clearly the extent of the damage. About actual size 1- For further and more detailed information, see Burke, H. K. ki,.\t-headed borers iFFKCTIXG FOREST TREES IN THE UNITED U. S. iJept. Agr. Bull. 4;)7, .S p., iUus. 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; Ho
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
