. An annotated list of the important North American forest insects. Forest insects. FiG. 7.—Egg of a powder-post beetle, Lyctus planicoUis, in pore of wood on radial section of ash ladder-run^ (Snyder.) stock; pore opened to show eg Highly moved from outdoors, open storage sheds, or other places which are cold in winter, to the dry kiln, the dormant larvse start to work in the wood, as shown by the ejection of boring dust or powder. Handling or jarring infested wood appears tempo- rarily to stop the activity of larvae contained in it. In general, the adults or beetles are active
. An annotated list of the important North American forest insects. Forest insects. FiG. 7.—Egg of a powder-post beetle, Lyctus planicoUis, in pore of wood on radial section of ash ladder-run^ (Snyder.) stock; pore opened to show eg Highly moved from outdoors, open storage sheds, or other places which are cold in winter, to the dry kiln, the dormant larvse start to work in the wood, as shown by the ejection of boring dust or powder. Handling or jarring infested wood appears tempo- rarily to stop the activity of larvae contained in it. In general, the adults or beetles are active be- tween the first of March and the last of July at "Washington, D. C. (about latitude 39° and longi- tude 77°, and practically at sea level), but the period varies according to the species, the tem- perature of the storerooms, and the geographical location. According to the senior author, the vari- ation due to latitude, longitude, and altitude from a date at Wash- ington, D. C, will be approximately four days for each degree of latitude, 5° of longitude, and 400 feet of altitude, being earlier in the season southward, westward, and descending. The number of adult beetles that might be active and deposit eggs after the last of July at Washington, D. C., is so insignificant that practically no damage is done by them. Therefore the danger of attack would be over relatively earlier at parts south of Washington and west- ward, and later northward. The approximate dates of flying and Fig. 8.—Larva of a powder-post beetle, Lyctus plaiiicollis. En- larged. (Chitten- den.). 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 Al
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
