Annual report . these insects, and have resultedin the accumulation of a store of information of the greatest practicalvalue not only in the prosecution of the present undertaking, but inany problem of parasite introduction or control that may arise and almost revolutionary discoveries have been made inthe life histories of certain of these flies, and without this knowledgethe greatest success in handling them practically could not have beenreached. Similarly, Mr. A. F. Burgess, in charge of the Coleoptera, has suc-ceeded in a very perfect way in rearing and liberating the
Annual report . these insects, and have resultedin the accumulation of a store of information of the greatest practicalvalue not only in the prosecution of the present undertaking, but inany problem of parasite introduction or control that may arise and almost revolutionary discoveries have been made inthe life histories of certain of these flies, and without this knowledgethe greatest success in handling them practically could not have beenreached. Similarly, Mr. A. F. Burgess, in charge of the Coleoptera, has suc-ceeded in a very perfect way in rearing and liberating the importantEuropean predatory beetle (Calosoma sycophanta), as well as someother insects of the same family. Altogether, down to July 1, 1908, the following material was im-ported : - Brown-tail moth egg masses, about 26,000. Hibernating nests of the brown-tail moth, from 50,000 to 60,000. Free larva? and pupfe of the brown-tail moth, about 178,000. Gypsy moth egg masses, 7 boxes, each containing very many BREEDING CAGES AND TRAYS FOR PARASITES OF THEBROWN-TAIL MOTH AT LABORATORY. 1909.] PUBLIC DOCUMENT--No. 73. 73 Gypsy moth larvae and pupae, about 161,000. Gypsy moth larvae from Japan, 8 large boxes, containing severalthousand larvae and parasite cocoons. Predatory beetles, 2,892. It will be noticed that only about half as many of the hibernatingnests of the brown-tail moth were imported during the winter of 1907-08 as during the winter of 1906-07; but the smaller number is offset bythe larger numbers of larvae, pupae and egg masses, so that the grossamount received is about the same as that of the previous year. Thematerial received from Japan listed above came in before July 1, butin all there have been received about 40 boxes, nearly all of large one shipment of the cocoons between 40,000 and 50,000 adultsof one of the most important parasites of the genus Glyptapanteleswere reared and were liberated directly in the open. The colonization work has been goi
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