Aphids, cicadas, stink bugs, bed bugs, and water bugs are part of Hemiptera and are actually bugs. However, beetles, butterflies, bees, and flies are all just insects. There are also non-insect pests like millipedes, pillbugs, and spiders that are in completely different categories.

What is the difference between a bug and a beetle?

The main difference between a bug and a beetle is that a bug belongs to the order Hemiptera whereas a beetle belongs to the order Coleoptera. Therefore, bugs have needle-like mouthparts while beetles have chewing mouthparts. …

What is classified as a bug?

Strictly speaking, a bug is an insect in the group Hemiptera – it must have piercing mouthparts. Cicadas are Hemiptera, but spiders aren’t. Often though, ‘bug’ means a creepy-crawly in everyday conversation. It refers to land arthropods with at least six legs, such as insects, spiders, and centipedes.