It will be remembered that the labrum is provided with a groove.
The labrum is considered by some authorities to be the hypopharynx.
They make the puncture and are interlocked with the labrum to form a sucking tube.
There are teeth on each side of the central notch of the labrum.
The labrum or upper-lip is fulvous; and the antenn are piceous.
Yet this labrum is a large marble vessel seven feet in diameter.
The labrum, or upper lip, is separated by a deep suture from the clypeus, and is trapezoidal in form.
Labrum (fig. 3) very broad and extensive, flattened, pale in color, the anterior margin with about two sense-organs.
Labial lobes large, oval, contiguous with one another, at the tip of the labrum.
The calidarium had the labrum at one end, and the alveus was in one side of the room.