from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The tonguelike structure in front of or above the labium in the mouth of an insect.
from The Century Dictionary.
- noun In entomology, a fleshy organ, generally strengthened with chitinous sclerites, projecting from the floor of the mouth at the opening of the pharynx or gullet.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Zoöl.) An appendage or fold on the lower side of the pharynx, in certain insects.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy bottom part of the
pharynx, the part of the throat that connects to the esophagus
from Wiktionary, Creative Commons Attribution/Share-Alike License
Just below this is the hypopharynx, the lateral margins of which are very thin.
As soon as the wound is made the insect pours out through the tube of the hypopharynx some of the secretion from the salivary glands and then begins to suck up the blood through the hollow labrum into the pharynx and on into the stomach.
Phallus: = penis: q.v. Pharyngeal pump: = sucking pump; q.v. Pharynx: the back part of the mouth and upper part of the throat: a slight enlargement at the beginning of the oesophagus: in Diptera is sometimes restricted to the space between the hypopharynx and sub-clypeal pump, and is then = sub-clypeal tube.
There are two sets of these, each having three lobes with a common duct which joins the duct from the other set a short distance before they enter the base of the hypopharynx.
Endolabium: the inner or mouth surface of the labium: the hypopharynx when that is well developed.
Metastoma: in Orthoptera: = hypopharynx: q.v. Metatarsus: applied to basal joint of tarsus, where that differs greatly in length or otherwise from the other joints: see sarothrum.
Lepidoptera and Diptera, to maxillary structures: has also been used for the hypopharynx, and that use might be adopted: a median organ of the hypopharynx in Apterygota.
Hypopharyngeal sclerites: in bees, a pair of strap-like pieces along the hypopharynx to the mentum: see also epipharyngeal sclerites.
Palate: = hypopharynx; q.v. Paleace: chaff or chaffy: = paleaceous.
The hypopharynx is united to the labium, the mandibles are wanting and the maxillæ are very much reduced so that the insect is unable to pierce the tough skin of animals.