1. The antennae of butterflies are usually long and somewhat knobbed at the tip , but most moths have short , plumose or branched , but not knobbed antennae .

2. The overall shape of most insect Antennae is elongate and cylindrical, although elaborations into plumose, lamellate, or pectinate forms have arisen many times in different insect lineages.

3. Many of these Appendages, especially those used for moving water or capturing suspended food particles, carry planar arrays of plumose setae--bristles with even smaller, short fibers (setules) distributed evenly along two sides of each bristle.