. Manual of the apiary. Bees. 60 MANUAL OF THE APIART. vivifying air, and are thus called rat-tailed. Even the pupae of the mosquito, awaiting in its liquid home the glad time when it shall unfold its tiny wings and pipe its war-note, has a similar arrangement to secure the gaseous pabulum. The digestive apparatus of insects is very interesting, and, as in our own class of animals, varies very much in length and complexity, as the hosts of insects vary in their habits. As in mammals and birds, the length, with some striking excep- tions, varies with the food. Carnivorous or flesh-eating in- se
. Manual of the apiary. Bees. 60 MANUAL OF THE APIART. vivifying air, and are thus called rat-tailed. Even the pupae of the mosquito, awaiting in its liquid home the glad time when it shall unfold its tiny wings and pipe its war-note, has a similar arrangement to secure the gaseous pabulum. The digestive apparatus of insects is very interesting, and, as in our own class of animals, varies very much in length and complexity, as the hosts of insects vary in their habits. As in mammals and birds, the length, with some striking excep- tions, varies with the food. Carnivorous or flesh-eating in- sects have a short alimentary canal, while in those that feed on vegetable food it is much longer. Tig. AMmentary Canal. o—Honey stomach, c—Urinary tubes. &—True stomach, d—Intestine. The mouth I have already described. Following this is the throat or pharynx, then the oesophagus or gullet, which may expand, as in the bee, to form a honey or sucking stomach (Pig. 9, o), may have an attached crop like the chicken, or may run as a uniform tube as in our bodies, to the true stom- ach (Fig. 9, b). Following this is the intestine—separated by some into an ileum and a rectum—which ends in a vent or anus. In the mouth are salivary glands, which in larvae that form cocoons are the source of silk. In the glands this is a viscid fluid, but as it leaves the duct it changes instantly. 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, 1842-1916. Chicago, Ill. , T. G. Newman
Size: 2159px × 1158px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1880, booksubjectbees, bookyear1880
