Pselliopus cinctus

(Fabricius, 1776)

Ringed Assassin Bug

Pselliopus cinctus is a of assassin bug in the Reduviidae, commonly known as the Ringed Assassin Bug. It is found in North America and is a predatory true that hunts other insects. The species has been documented in ambush , including stalking bees and other prey on flowers.

Pselliopus cinctus by (c) Judy Gallagher, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Pselliopus cinctus: //səˈlaɪ.əˌpʊs ˈsɪŋk.təs//

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Identification

Distinguished from other assassin bugs by the combination of long legs, ringed or banded color pattern, and -specific . Separated from the similar orange assassin bug (Pselliopus barberi) by color pattern details—P. cinctus has ringed markings while P. barberi has orange with black jailhouse stripes. Distinguished from Zelus (milkweed assassin bugs) by lack of sticky forelegs. Separated from wheel bugs (Arilus cristatus) by smaller size and lack of the distinctive wheel-like pronotal structure.

Images

Habitat

Found in meadows, gardens, and areas with flowering plants where prey insects are abundant. Observed on spent flowers and blossoms where it ambushes visiting and other insects.

Distribution

North America; confirmed present in the United States including Vermont and other regions.

Diet

Predatory; feeds on other insects. Documented prey includes bees, aphids, leafhoppers, lacewings, lygus bugs, and caterpillars. Uses ambush hunting strategy on flowers to capture and other visiting insects.

Behavior

Ambush that stalks prey on flowers. Has been observed waiting on spent flowers for such as leafcutter bees (Megachile), then attempting to stab them with its beak to inject venom and consume liquefied body contents. Hunting attempts may last approximately one minute before prey either escapes or is captured.

Ecological Role

that contributes to of herbivorous insects. Functions as a natural enemy of various pest insects including aphids and caterpillars, as well as such as bees.

Human Relevance

Beneficial as a natural agent for garden and agricultural pests. No documented negative impacts on humans; not known to be a significant biting pest to humans.

Similar Taxa

Pselliopus barberiSimilar orange and black coloration, but P. barberi has distinct black jailhouse stripes rather than ringed pattern; both are in Pselliopus with similar body form and hunting .
Zelus longipesBoth are assassin bugs with similar predatory habits, but Z. longipes has sticky forelegs for prey capture and lacks the ringed color pattern of P. cinctus.
Arilus cristatusBoth are North American assassin bugs and , but wheel bugs are much larger with a distinctive wheel-like pronotal structure and different coloration.

More Details

Hunting behavior documentation

A detailed observation in a Vacaville garden documented P. cinctus stalking a male leafcutter bee (Megachile) on a spent flower. The assassin bug approached stealthily but the detected danger and escaped. This matches the typical ambush strategy of the .

Taxonomic placement

Member of the tribe Harpactorini within Harpactorinae, a diverse group of predatory true bugs. The Pselliopus contains multiple North American with similar ecologies but distinguishable by color pattern and minor morphological differences.