Basal portion of the labium, which is connected on either side to the stipes of the maxilla, and which bears the ligula apicomedially and the paired labial palpi apicolaterally. [drawing][photo][drawing

A labial sclerite articulating basally with the mentum and bearing the glossae, paraglossae, and palpi apically.

The distal or fore part of the labium. (Figure )