. An annotated list of the important North American forest insects. Forest insects. iMi'M'j].•!'... , i ?,; r'^^'. ' ,., >l „ h'.»l ^Ail^Mll .M',^kM tl>^ r;—T— "^'~'' "^ '? ' I '?!'i'"'"^' ;;| , ,'' ' » j * a, ¥' ? f ;;t,i ^ "* .ilvi k if|!'*ij PLATE II. WORK OF SPRUCE, FIR, AND PINE INSECTS. A. Cross section of spruce showing ring retardation, due to defoliation, on tree that has recovered from Budworm. B. Ring retardation on tree that has not recovered. C. Egg tunnels of Pityokteinex sparsus in fir. (Slightly enlarged). D. Tunnels of Ips perturbaUis
. An annotated list of the important North American forest insects. Forest insects. iMi'M'j].•!'... , i ?,; r'^^'. ' ,., >l „ h'.»l ^Ail^Mll .M',^kM tl>^ r;—T— "^'~'' "^ '? ' I '?!'i'"'"^' ;;| , ,'' ' » j * a, ¥' ? f ;;t,i ^ "* .ilvi k if|!'*ij PLATE II. WORK OF SPRUCE, FIR, AND PINE INSECTS. A. Cross section of spruce showing ring retardation, due to defoliation, on tree that has recovered from Budworm. B. Ring retardation on tree that has not recovered. C. Egg tunnels of Pityokteinex sparsus in fir. (Slightly enlarged). D. Tunnels of Ips perturbaUis in white spruce. (J natural size). E. Tunnels of Ips pini in white pine. (^ natural size). F. Egg tunnel and larval mines of Dendroclonus piceaperda in spruce. G. Tunnels of Ambrosia Beetles in wood of 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), b. 1894; Beal, J. A; Middleton, William, b. 1893; Burgess, A. F; Busck, August, 1870-1944; Carl A. Schenck Collection (North Carolina State University) NCRS. [Washington, D. C. : s. n.
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
