. An annotated list of the important North American forest insects. Forest insects. POWDER-r'OST DAMAGE BY LYCTUS BEETLES. 13 West Virginia, Ohio, Indiana, Illinois, Missouri, loAva, Michi- gan, and Minnesota. The great number of specimens in the col- lection of the United States National Museum show but a single record from the South Atlantic and Gulf States, and this is evi- dently a temporary introduction. Undoubtedly the species is fre- quently carried into the southern region, but evidently it does not survive there. This beetle is common in commercial products of seasoned hickory, oak, w
. An annotated list of the important North American forest insects. Forest insects. POWDER-r'OST DAMAGE BY LYCTUS BEETLES. 13 West Virginia, Ohio, Indiana, Illinois, Missouri, loAva, Michi- gan, and Minnesota. The great number of specimens in the col- lection of the United States National Museum show but a single record from the South Atlantic and Gulf States, and this is evi- dently a temporary introduction. Undoubtedly the species is fre- quently carried into the southern region, but evidently it does not survive there. This beetle is common in commercial products of seasoned hickory, oak, walnut, and ash, and occasionally in poplar, wild cherry, and locust. It is not i-ecorded from natural growth in the open in this country, but is said to infest such growth, as well as commercial products, in Europe. Adults of the European species, which has been shown to have a relatively northern distribution in the United States, begin activity as early as the first part of March in its southern distribution and are still active during the first part of August in its northern distribution, general emergence of the adult beetles from infested wood occurring at Wash- ington, D. C, from April until June. The eggs are deposited soon after the adult beetles emerge and are inserted into the pores of the wood by means of a long, slender, flexible ovipositor. The winter is passed in the larval stage in the wood. General pupation occurs from about the middle of April to the first of May in the District of Columbia. THE SOUTHERN LYCTUS.^ The southern Lyctus beetle is pitchy black, slen- powder-post beetle, der, somewhat flattened, elongate, and from one- Lyctus piamcoius. tenth to one-fifth inch in length. The wing covers have smaller, finer, and deeper punctures in more or less distinct double rows. Individuals of this species vary extremely in size, and there is marked difference in size between the sexes, the males often being much smaller than the females. As the result of con- tin
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
