L: Beetle head with antenna removed showing socket
R: Scape of antenna fits in socket
Insects can use their antennae to sense objects using both tactile and chemo receptors. Insects with long antennae such as a male long-horned beetle use antennae to search for females. Their long antennae give them a wider search area. Nocturnal insects such as katydids, move at night and can sense objects far in front providing early warning of a lurking predator.
Antennae can be directed to collect…
Source: Living With Insects Blog