. Sacbrood. Bees. 12 BULLETIN 431, U. S. DEPAKTMENT OF Fig. 8.—End view of capped cell whioh con- tains a larva dead of sacbrood, being simi- lar to the one shown in figure 9. The cap here is not different from a cap of the same age over a healthy larva. (Original.) stage is reached. It is rare to find a pupa dead of sacbrood (PL II, zz). The larvae that die (fig. 7) are found lying extended lengthwise with the dorsal side on the floor of the cell. They may be found in capped (fig. 8) cells or in cells which have been tmcapped (fig. 9), as bees often remove the caps from cells co
. Sacbrood. Bees. 12 BULLETIN 431, U. S. DEPAKTMENT OF Fig. 8.—End view of capped cell whioh con- tains a larva dead of sacbrood, being simi- lar to the one shown in figure 9. The cap here is not different from a cap of the same age over a healthy larva. (Original.) stage is reached. It is rare to find a pupa dead of sacbrood (PL II, zz). The larvae that die (fig. 7) are found lying extended lengthwise with the dorsal side on the floor of the cell. They may be found in capped (fig. 8) cells or in cells which have been tmcapped (fig. 9), as bees often remove the caps from cells containing dead larvae. Caps that are not removed are more often en- tire, yet not infrequently they are found to have been punctured by the bees. Usually only one puncture is found in a cap (PI. II, d), but there may be two (fig. 10) or even more (PI. 11,/). The punctures vary in size, sometimes approximating that of a pinhead, although usually smaller, and are often irregular in outline. Sometimes a cap (fig. 11, PL II, l) has a hole through it which suggests by its position and imiform circumference that it has never been completed. Through such an opening (fig. 11; PL II, e) or through one of the larger punctures the dead larva may be seen within the cell. A larva recently dead of sacbrood is slightly yellow. The color in a few days changes to brown. The shade deepens as the process of decay con- tinues, until it appears in some in- stances almost black. Occasionally for a time during the process of decay the remains present a grayish appear- ance. In sacbrood, during the process of decay, the body wall of the dead larva (figs. 7 and 9) toughens, permit- ting the easy removal of the re- mains intact from the cell. The content of the sacHke remains, dur- ing a certain period of its decay, is watery and granular in appearance. Much of the time the form of the remains is quite similar to that of a healthy larva. If the dead larva is not removed, its surface through evaporation
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwa, booksubjectbees
