It will be remembered that the labrum is provided with a groove.
They make the puncture and are interlocked with the labrum to form a sucking tube.
The labrum is considered by some authorities to be the hypopharynx.
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 ...