Appearance
The eastern velvet ant is the largest of the velvet ant species in the United States, attaining an approximate length of 0.75 in. Adults display aposematic coloration, consisting of black overall coloring with an orange-red pattern on the dorsal surface of the thorax and abdomen. They are covered in dense, velvet-like hair.
Behavior
Females are capable of an extremely painful sting, hence the name "cow killer". They are extremely quick-moving and often take a defensive posture when threatened. They seek out the brood cells of Eastern cicada killers and other large ground-nesting members of Crabronidae, where they deposit an egg onto a host larva. The egg quickly hatches into a white, legless grub, which consumes the host and goes through several larval stages prior to pupa formation. Unlike the females, males have dark, transparent wings and do not deliver a sting.References:
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