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NC State Extension

Euthyrhynchus Bug

  • Common Name: Euthyrhynchus Bug
  • General Category: Beneficial Predator
  • Taxonomic Classification: Hemiptera: Pentatomidae
  • Scientific Name: Euthyrhynchus floridanus

Description

This very distinctive iridescently colored predator can be easily distinguished from other predatory stink bugs, It is also a generalist predator, meaning it’s not a picky eater. Like all true bugs (Hemiptera) these predators have a beak. To feed, they swing their beaks up from under their bodies, sneak up to their prey and jab them with the harpoon-like tips. They inject digestive enzymes through the beak that soon render the prey immobile, after which they suck up the digested insides.

Euthyrhynchus Bug adult Euthyrhynchus Bug nymph

Identification

Review the images for tips on how to identify these predators.

Adults

Distinctive iridescent purple-black coloration on legs and bodies, as well as three orange to red spots on the top of the abdomen. The “shoulders” also have spines like spined soldier bugs. Like all predatory stink bugs, Euthyrhynchus bugs have beaks that are at least twice as thick as their antennae (See a comparison).

Nymphs

No wings. Beaks like adults. The overall shape is rounded with a somewhat flattened underside. Distinctive purple-black legs and body with an orange or red area on top of the abdomen.

Value in Pest Management

These predatory stink bugs feed on a variety of plant feeding insects, including some that are pests. Because they’re less abundant than spined soldier bugs, they likely do not contribute as much to natural control. They are not sold commercially.

Origin and Distribution

Native, throughout the southeastern United States.

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