lower "lip" of larva that is extended during prey capture

The singular form of labia.

"lip or lip-like part," 1590s, plural labia (q.v.), from Latin labium "lip" (see lip (n.)).

Mouthpart in insects composed of fused second maxillae; homologous to second maxillae of crustaceans. labrum

(head, mouthparts) – plesiomorphically in Coeloptera the labium comprises a tripartite prementum (bearing the labial palps), mentum and submentum.  Curculionoidea have a prementum

N lip; flange

a platelike structure located between the two endites

a compound structure which forms the 'lower lip' or floor of the mouth in mandibulate insects (i.e. insects with biting jaws).  It is positioned behind the first maxilla and opposite the labrum.  The labium is often regarded as the 'second maxilla' and is also sometimes referred to as the 'tongue'.

The 'lower lip' of the insect mouth-parts, formed by the fusion of two maxilla-like appendages. Labrum.

lower lip

The most posterior of the gnathal appendages; a composite structure forming the floor of the mouth cavity in mandibulate mouth parts and appendages which are variously modified in haustellate forms.

Distal

(plural labia)   The “lower lip” of the insect mouthparts. In stag beetles it has a sensory palp with which they taste their food and a specialised part covered with bristles, it is [..]

     lower lip of an insects mouth. Labrium:   

the lower ‘lip’ of butterflies and moths, below the proboscis

mouthpart in insects composed of fused second maxillae; homologous to second maxillae of crustaceans (Glossary of PM)

an insect mouthpart that functions as a lower lip

(anatomy) A liplike structure; especially one of the two pairs of folds of skin either side of the vulva. (botany) The lip of a labiate corolla. (music) The lip against which pressured air is dr [..]