Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . spun a silken gallery inwhich the worm lived. On removing the bunches of dis-eased cones to Providence, one cater-pillar transformed in a warm cham-ber into a moth, which appeared theend of October; its metamorphosiswas probably accelerated by the un-usually warm autumnal the others had by the 1st ofNovember spun within the mass ofcastings a loose, thin, but firm, ovalcocoon, about half an inch long anda quarter of an inc
Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . spun a silken gallery inwhich the worm lived. On removing the bunches of dis-eased cones to Providence, one cater-pillar transformed in a warm cham-ber into a moth, which appeared theend of October; its metamorphosiswas probably accelerated by the un-usually warm autumnal the others had by the 1st ofNovember spun within the mass ofcastings a loose, thin, but firm, ovalcocoon, about half an inch long anda quarter of an inch wide, but thelarvfe had not yet begun to changeto chrysalids. Whether in a state of nature they winter over in thelarval state within their cocoons, or, as is more likely, change to pupoein the autumn, appearing as moths by the end of spring, remains to beseen. The chrysalis is of the usual Phycid appearance, rather slender, butwith the abdominal tip blunt, with no well-marked cremaster or spine,though ending in the usual six curved stiff bristles, by means of whichit hooks on to the walls of its cocoon, thus maintaining itself in its nat-ural Fig. 288.—Maas of infested cones (original). 856 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION 1 fouud only one tree next to the house thus affected by this is probable that in a dense spruce growth the trees would be less exposed to the attacks of what may prove aserious enemy of shade spruces. The obviousremedy is, to burn the affected cones and massof castings late in summer.
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