. An annotated list of the important North American forest insects. Forest insects. Circular No. 97 Issued February G, 1908. United States Department of Agriculture, BUREAU OF ENTOMOLOGY, L. O. HOV/ARD, Entomologist and Chief of Bureau. THE BAGWORM. (Thiiridopteryx ephemerirforiiiDi Haw.). By L. O. Howard and F. H. Chittenden. GENERAL APPEARANCE AND NATURE OF ATTACK. Shade trees, shrubs, and hedges, and in particular evergreens, are much subject to injury b}' a medium-sized caterpillar which has a curious habit of crawling about on the infested trees in a bag-like case, whence its common name
. An annotated list of the important North American forest insects. Forest insects. Circular No. 97 Issued February G, 1908. United States Department of Agriculture, BUREAU OF ENTOMOLOGY, L. O. HOV/ARD, Entomologist and Chief of Bureau. THE BAGWORM. (Thiiridopteryx ephemerirforiiiDi Haw.). By L. O. Howard and F. H. Chittenden. GENERAL APPEARANCE AND NATURE OF ATTACK. Shade trees, shrubs, and hedges, and in particular evergreens, are much subject to injury b}' a medium-sized caterpillar which has a curious habit of crawling about on the infested trees in a bag-like case, whence its common name of bagworm or basket worm. In the shelter of these cases the insects undergo all their transformations, after which the bags remain attached to the plants for some time and are conspic- uous objects on leafless trees and shrubs in late autumn and in winter. Like the tussock moth" and the fall webworm^ this species is preeminently a pest on the streets and in parks and private grounds of cities and towns and is even more subject to fluctuation in num- bers. It is, however, more limited in distribution and not found as a rule north of southern 'New York and the central portions of Pennsylvania and Ohio. South of these points it is in certain years very trou- blesome and the subject of much complaint. Such a year was 1907, when the bagworm attracted greater F'"^'- i—Bagworm ,, ^. ., ii i 1 £? !• i XT {Thyridopteryx attention tiian any other tree deroliator. ^Numerous ephcmcnc/ormis). complaints were received of injuries in the region Natural size (af- mentioned, and especially from the States of New Jersey, Pennsylvania, Mainland, Virginia, West Virginia, Ohio, Indiana, and Illinois. The natural enemies of this insect (see p. 6) were comparatively scarce, and there is a strong possibility of a recur- rence of injuries in the years to come. The general appearance of the bagworm is shown in figure 1, which illustrates the caterpillar when nearly full grown, in its cha
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
