. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 17.—Third stage: Dorsal view of an- terior third of larva dead of sacbrood. (Origiaal.) yet in aU cases entirely disappeared. Anterior third.—The shade of brown is deeper in the anterior third (fig. 15; PI. II, i) as a rule than in the other two thirds. On the ventral surface of the anterior third there are sometimes present minute, very dark, nearly black areas, appearing Uttle more than mere points. Upon dissecting away the molt skin, these areas are found to be associated with the developing head and thoracic a
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 17.—Third stage: Dorsal view of an- terior third of larva dead of sacbrood. (Origiaal.) yet in aU cases entirely disappeared. Anterior third.—The shade of brown is deeper in the anterior third (fig. 15; PI. II, i) as a rule than in the other two thirds. On the ventral surface of the anterior third there are sometimes present minute, very dark, nearly black areas, appearing Uttle more than mere points. Upon dissecting away the molt skin, these areas are found to be associated with the developing head and thoracic appendages of the bee. The position of the anterior third in this stage has changed only slightly from that observed in the preceding one. The apex is farther from the roof of the cell (PI. II, i). The deflection is more marked and is seen in a greater number of larvae. The surface markings have not changed materially. Middle and 'posterior thirds.—The changes that have occurred in each of these two thirds are still similar and can, therefore, again be described together. Fig. 16.—Second stage: Larva dead of sacbrood, ventral view. (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.
Size: 1513px × 1651px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
