Toe biters

Definition

A common name for giant water bugs (family Belostomatidae), large predatory freshwater hemipterans notorious for inflicting painful defensive bites when handled or when swimmers disturb them in shallow water. The name reflects their habit of grasping toes and other exposed body parts with raptorial forelegs and piercing with a needle-like rostrum. Most toe biters belong to genera Lethocerus and Benacus, with Lethocerus species reaching 12 cm and ranking among the largest true bugs. They are sit-and-wait predators that ambush aquatic vertebrates and invertebrates, including fish, tadpoles, snails, and other insects.

Etymology

From the insect's documented habit of biting human toes in wading situations, recorded in North American vernacular since at least the early 20th century.

Example

Lethocerus americanus, the eastern toe biter, frequently bites swimmers in ponds and slow streams across eastern North America, causing intense but medically minor pain.

Synonyms

• Giant water bugs
• electric-light bugs
• Indian toe-biters

Related Terms

• Belostomatidae
• Lethocerus
• raptorial forelegs
• hemipteran
• aquatic insects
• defensive biting

Usage Notes

Toe biters is strictly vernacular; specialists use Belostomatidae or genus names (Lethocerus, Benacus, Abedus). The term is sometimes applied loosely to any large, biting aquatic bug, but properly refers only to belostomatids. Electric-light bugs refers to their attraction to lights at night. Not to be confused with backswimmers (family Notonectidae), which also bite but are smaller and swim upside down.