Timulla barbata

Wingless females distinguished from true ants (Formicidae) by lack of elbowed antennae and presence of a straight, wasp-like petiole. Distinguished from other Mutillidae by combination of color pattern and geographic range. Resembled by the spider Sergiolus capulatus, which exhibits Batesian mimicry of Timulla species.

Dense velvety pubescence covering the body, typical of Mutillidae. Coloration includes red on the body with black legs and black-and-white patterning on the abdomen. Females are wingless; males possess wings. The integument is heavily setose, creating the characteristic 'velvet' appearance.

Sun-dappled patches on deciduous forest floors; open dry areas including gardens, meadows, and lawns with sparse vegetation.

North America. Specific range details for T. barbata not distinguished from congeners in available sources; genus Timulla occurs broadly in eastern and central United States.

Females are solitary and ground-dwelling. Both sexes possess a potent sting; females are reported to produce audible stridulation when disturbed. Rapid, erratic movement when fleeing potential threats.

Parasitoids of ground-nesting bees and wasps. Adults may contribute to pollination through incidental contact with flowers.

Females can deliver a painful sting, leading to caution among observers. Frequently mistaken for true ants due to common name and appearance. Subject of mimicry by harmless spiders, which may benefit from reduced predation risk.

• Sergiolus capulatusSpider exhibiting Batesian mimicry of Timulla velvet ants; distinguished by eight legs, spinnerets, and lack of stinger
• Dasymutilla occidentalisAnother large eastern Mutillidae species; distinguished by different color pattern (often bright red and black)

• Mutillidae
• velvet ant
• mimicry model
• wingless wasp
• Hymenoptera

• BugGuide
• iNaturalist taxon
• Bug Eric: Ground Spiders, Sergiolus