Hornets are large eusocial wasps.
The true hornets make up the genus Vespa, and are distinguished from other vespids by the width of the vertex (part of the head behind the eyes), which is proportionally larger in Vespa; and by the anteriorly rounded gasters (the section of the abdomen behind the wasp waist).
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Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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