. Bulletin. Agriculture -- New Hampshire. i8 THE INSECT RECORD FOR I9OO also see small white specks which through a lens looked like bits of fine spun silk. The author of all this injury was a tiny caterpillar, so minute as commonly to be overlooked. It has been called the Birch Leaf ^ from the name of the genus to which it belongs, but a better common name would be Birch Leaf Skeletonizer. The little white objects on the leaves were temporary cocoons built by the caterpillars for protection during moulting, and consequently called moulting cocoons. The insect when full grown makes
. Bulletin. Agriculture -- New Hampshire. i8 THE INSECT RECORD FOR I9OO also see small white specks which through a lens looked like bits of fine spun silk. The author of all this injury was a tiny caterpillar, so minute as commonly to be overlooked. It has been called the Birch Leaf ^ from the name of the genus to which it belongs, but a better common name would be Birch Leaf Skeletonizer. The little white objects on the leaves were temporary cocoons built by the caterpillars for protection during moulting, and consequently called moulting cocoons. The insect when full grown makes a regular cocoon in which it changes to a pupa to change later to a tiny moth. Spraying with arsenate of lead when the injury first appears would probably prove an effective remedy in case of a few ornamental trees. The appearance of the injured leaves is shown in Fig. 11. Among the interesting insects bred during the season was the beautiful Hunter's Butterfly,'^ also called the Painted Lady. The caterpillar of this insect may be found on the leaves and among the blossom heads of the com- mon tall Everlasting.* They have the pecu- liar habit of making protective cases by gnawing off'the wool- ly hairs of the food- pi ant and binding them together with silken threads. The caterpillars remain within or beneath these cases, feeding on the substance of the leaves. As they approach maturity they frequently web together the upper leaves and the flower heads to make a sort of airy cell in the ^Biicciilatrix canadensisella Chambers. "^Pyrameis hiititera Fabricius. 3A plant of the genus Fig. 8.—Caterpillar of Hunter's 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 New Hampshire Agricultural Experiment Station. [Hanover, N. H. ] : New Hampshire Agricultural Experiment Station
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