Monkey grasshoppers

Definition

A common name for grasshoppers of the family Eumastacidae, distinguished by their slender, often brightly colored bodies, elongated hind legs adapted for leaping, and a characteristic posture with the body held nearly vertical when at rest. Unlike typical grasshoppers (Acrididae), eumastacids frequently inhabit shrubs and trees rather than ground-level vegetation and exhibit reduced wing development in many species.

Etymology

From the upright, alert posture reminiscent of a monkey's stance, combined with 'grasshopper' for the orthopteran habit of jumping.

Example

The South American monkey grasshopper *Eumastax* spp. clings vertically to twigs with its forelegs, presenting a narrow profile that mimics a stick or thorn.

Synonyms

• eumastacids

Related Terms

• Eumastacidae
• Acrididae
• orthopteran
• saltatorial legs
• aposematic coloration
• arboreal insects

Usage Notes

Primarily a vernacular term; specialists use 'Eumastacidae' or 'eumastacids.' The family is sometimes called 'monkey locusts' in older literature, though 'locust' properly refers to swarming acridids. Not to be confused with 'monkey beetles' (Scarabaeidae: Rutelinae) or other unrelated common names.