The sponging mouthparts consist of a fleshy, elbowed labium, at the distal end of which are large, sponge-like organs called the labella (singular, labellum). The labella is a complex structure consisting of many grooves, called pseudotrachea, which sops up liquids much like a sponge does.

image digitally manipullated extreme macro focus stacking insects nice macro prepared specimen studio shot diptera fly mouth parts