wheel bug

an assassin bug, Arilus cristatus, that has a toothed, semicircular crest on the pronotum and preys on other insects.

1805–15, Americanism

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World English Dictionary
wheel bug
a large predatory North American heteropterous insect, Arilus cristatus, having a semicircular thoracic projection: family Reduviidae (assassin bugs)

Collins English Dictionary - Complete & Unabridged 10th Edition
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