. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 15.—Second stage: Dorsal view of an- terior third of a larva dead of sacbrood. (Original.) surface left from the removal of tissues is somewhat roughened, indicating that the removed portion has been taken away piecemeal, and is more or less transverse to the larva. Consistency of the larva in the first stage.—The cuticular portion of the body wall, which chiefly constitutes the sac that characterizes the disease sac- brood, is less easily broken at this time than in the healthy larva. Wlien the body wall is broke
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 15.—Second stage: Dorsal view of an- terior third of a larva dead of sacbrood. (Original.) surface left from the removal of tissues is somewhat roughened, indicating that the removed portion has been taken away piecemeal, and is more or less transverse to the larva. Consistency of the larva in the first stage.—The cuticular portion of the body wall, which chiefly constitutes the sac that characterizes the disease sac- brood, is less easily broken at this time than in the healthy larva. Wlien the body wall is broken the tissues of the larva, which constitute the contents of the sac, flow out. This fluid tissue mass is less milky in appearance than that from a normal larva. The granular (character of the con- tents of the sac which is marked in later stages of decay is already in evidence. By microscopic examination the granular appearance is found to bo duo chiefly to fat cells. Condition of the virus in the first stage.—When larva? of this stage uro crushed, suspended in sirup, and fed to healtliy bees, a largo Fio. 14.—First stage: Portion of a larva dea^J of sacbroo*!, showing a more or less tran-sveric roughened surface from wliich the bees have removed a portion of tlie Jarva ijiecemeal. (Original.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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