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This fluid, which is scarcely inferior to honey in sweetness, issues in limpid drops from the abdomen of these insects, not only by the ordinary passage, but also by two setiform tubes placed, one on each side, just above it.

It follows that when the whole instrument is exserted, we perceive a long membranous flexible tube hanging down from the labium, and along the walls of this tube the setiform mandibles and maxillæ in the shape of long narrow bands of chitine.

Setiform: in the form of a bristle or seta: when a slender short bristle arises from a thicker basal joint.

Antennæ short; third joint round; arista apical, long, slender, setiform.

Antennæ very short; third joint round; arista apical, long, slender, setiform.