. The bee-keeper's guide : or, Manual of the apiary. Bees. OR, MANUAI. OF THE APIARY. 83 neumon, 1-400; water beetle, 1-4200. In man it is 1-40. So we see that the bee is at the summit of insect intelligence, as man is of the vertebrate. The convolutions (Fig. 30) add to the argument. From the brain many fibers extend on each side to the compound eyes. The minute nerves extend everywhere, and in squeezing out the viscera of an insect, are easily visible. In the larva the nerve cord is much as in the adult insect, except the ganglia are more numerous. Girard says, that at first in the larva of
. The bee-keeper's guide : or, Manual of the apiary. Bees. OR, MANUAI. OF THE APIARY. 83 neumon, 1-400; water beetle, 1-4200. In man it is 1-40. So we see that the bee is at the summit of insect intelligence, as man is of the vertebrate. The convolutions (Fig. 30) add to the argument. From the brain many fibers extend on each side to the compound eyes. The minute nerves extend everywhere, and in squeezing out the viscera of an insect, are easily visible. In the larva the nerve cord is much as in the adult insect, except the ganglia are more numerous. Girard says, that at first in the larva of the bee there are seventeen ganglia. The supra-oesophageal of the brain, three sub-cesophageal, three thoracic—one for each ring—and ten abdominal. Soon the three sub-oesophageal merge into one, as do also the last three abdominal, when there are in all thirteen (Fig. 31). In the Fig. Brain of Insect, after Dujardin. a a Antennae, ooo Ocelli. pupa, the last two of the thorax, and the first two abdominal, unite into the twin-like post-thoracic (Fig. 31), which supplies the meso, and meta-thoracic legs, and both pairs of wings with nerves. The fourth and fifth ganglia also unite, so that the adult worker-bee has nine ganglia in all. The brain or supra- oesophageal (Fig. 27), supplies nerves to the compound eyes, ocelli, antennae and labrum ; the sub-cesophageal gives off nerves to the mandibles, maxillae, and labium ; the first gan- glion of the thorax sends nerves to the anterior legs. There are only four abdominal ganglia in the drone. The brain (Fig. 29, 30), like our own, is enclosed in membranes, is com- posed of white and gray matter, and is undoubtedly the seat of intelligence. Hence, as we should suppose, the brain of the. 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 Cook, Albert John, 1842
Size: 1779px × 1404px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1900, booksubjectbees, bookyear1902
