. An annotated list of the important North American forest insects. Forest insects. A Sawfly Injurious to Young Pines. 7 The cocoons (fig. 7) have been found several inches underground and only in this location; but it is quite possible that some larva^, os- YEAR I YEARH YEARH JUNE JULY fJUG. SEPT. OCT. />pff. M/jy JUNE JULY me. SEPT OCT. fiPR. Mfir JUNE JULY RUG. SEPX EGGS L/}Rl'^£ COCOONS /foairs SGGS - ij9f>l/flE COCOONS fiOULTS ? - EGGS Lfiffme COCOONS ODULTS • ' "" "* ' ' ' Fig. 6.—Chart showing life and soasoiial history of Leconte's sawfly through the active period
. An annotated list of the important North American forest insects. Forest insects. A Sawfly Injurious to Young Pines. 7 The cocoons (fig. 7) have been found several inches underground and only in this location; but it is quite possible that some larva^, os- YEAR I YEARH YEARH JUNE JULY fJUG. SEPT. OCT. />pff. M/jy JUNE JULY me. SEPT OCT. fiPR. Mfir JUNE JULY RUG. SEPX EGGS L/}Rl'^£ COCOONS /foairs SGGS - ij9f>l/flE COCOONS fiOULTS ? - EGGS Lfiffme COCOONS ODULTS • ' "" "* ' ' ' Fig. 6.—Chart showing life and soasoiial history of Leconte's sawfly through the active period of throe years (November to March omitted, the insect being in the cocoon during this period). l^ecially those the adults of which will issue before winter, may spin their cocoons in more exposed places, even on the pine twigs. The. Fig. 7.—Cocoons of Leconte's sawfly : At left, unopened ones containing the insects ; at right, those from whicli adults have issued (emergence holes shown). The females issue from the larger cocoons and the males from the smaller ones. Approximately natural size. cocoons are tough, papery, red-brown, capsule-shaped cases, five- sixteenths to seven-sixteenths of an inch 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;
Size: 2032px × 1230px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
