. Bulletin. espèces d'Merajoorus, la dernière pour moi byMr aimablement déterminé. L. O. Howard. En outre, plusieurs espèces de diptères, werebred mais ils n'ont pas encore été déterminés. Spinosus Podisus. Dall,black les fourmis et les araignées ont été trouvées dans cousideiable destroyingthe les numéros de larves, et pas moins de 10 espèces différentes d'oiseaux se nourrissant d'wereobserved les chenilles. Piège à insectes BARNARDS. Au début d'avril 1891, M. W. C. Barnard, de Worcester, Mass., a envoyé 6 de ses pièges à insectes Moth et moniteur pour le procès ici en station. Ces ont été préparés conformément aux instructions, et dans les arbres hungin

• Contributeur: The Reading Room / Alamy Banque D'Images
• ID de l’image: 2AFKP5J
• Taille du fichier: 7,2 MB (375,3 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1203 x 2078 px | 20,4 x 35,2 cm | 8 x 13,9 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. Bulletin. species of Merajoorus, the last kindly determined for me byMr. L. O. Howard. Besides these, several species of Diptera werebred, but they have not yet been determined. Podisus spinosus Dall., black ants and spiders were found in cousideiable numbers destroyingthe larvae, and no less than ten different species of birds wereobserved feeding on the caterpillars. BARNARDS INSECT TRAP. Early in April, 1891, Mr. W. C. Barnard, of Worcester, Mass., sent six of his Monitor Moth and Insect Traps for trial here atthe Station. These were prepared according to directions, and hungin trees in the orchard and gardens. These traps are glass jars, with a tin arrangement on top withholes around the side, near the top. through which the insects findtheir way to the inside of the jar which is partly filled with an odor-ous liquid strongly attractive to insects. The outside of the glassjar has flowers painted upon it with luminous paint. Wishing to test the value of the flowers, 1 wrote to Mr. Barnard 117. BARNARD S MOTH TRAP. who kindly sent me two unpainted traps which were put in the samephice, and near the others, so that they would have an equal chancewith them. The comparison between the painted and unpaintedtraps, showed that the unpainted traps collected quite as many insectsas those that were painted, and therefore the painting is a needlessexpense. The traps were hung out April 21, and the insects collected fromthem each day and determined. This was continued until Sept. 15, when the work was closed up. It was not easy to make specificdeterminations of the insects that had been soaked in the liquid inthe traps, but they were determined as accurately as possible withthe following results : Beetles, 680 specimens ; wasps and bumble-bees, 1024 specimens ; butterflies and moths, 17, 590 specimens ; fliesof various kinds, 59, 376 specimens. A few plum curculios weretaken, but the greater number of the beetles were Ips fasciatus whichis a species said to be injurious. There

Recherche dans la banque de photos par tags

• bookcentury1800
• bookd
• bookpublisherslsn
• livresubjectagriculture