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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...by a series of simple experiments conducted at the laboratory. In the spring of 1908 a large number of cocoons of the tussock moth with egg masses attached was collected in East Cambridge, Mass., and from them in June a number of dermestid beetles issued, deter 1 U. S. Department of Agriculture, Bureau of Entomology, Technical Series 19, Part III, March 22,1911. mined by Mr. E. A. Schwarz as Anthrenus vcentsm'u.s Fab. and Tragedewna tarsaile Melsh. The Trogoderma was the more common of the two. Later, in the fall, another collection of old cocoons was made for the purpose of determining the status of these beetles. It was found that both of them fed, as larvae, upon the eggs of the tussock moth, and when they were confined in vials with eggs of the gipsy moth they fed not only upon the hairy covering of the egg masses, but also upon the eggs themselves. Larvae apparently of one of these species have several times been received at the laboratory associated with egg masses of the gipsy moth, which were in each instance collected upon the sides of buildings or in other situations different from those under which egg masses are most frequently encountered. As soon as the gipsy-moth caterpillars hatch, if, as frequently happens, the egg mass is situated in some particularly well-sheltered spot, the young caterpillars are liable to attack by small carabid beetles, several species of which have been found under "burlap bands in the spring apparently feeding upon the gipsy-moth caterpillars in this stage. Several of these species were made the subject of casual study in the summer_ of 1910, the results of which will be published later. The elaterid genus Corymbites, though not generally recognized as predaceous, is undoubtedly more or les
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