Thoracic-protuberances
Guides
Epacmus
Epacmus is a genus of bee flies (family Bombyliidae) characterized by a distinctive case of predator mimicry. Adults possess four prominent, black, polished, hemispherical bumps on the rear of the thorax that strikingly resemble the anterior median eyes of jumping spiders (Salticidae). When viewed from behind, these structures create the illusion of a small salticid spider, potentially deterring predation. The genus is small-bodied, measuring approximately 7–10 mm in length, with a tapered, fuzzy appearance and delicate wings. Taxonomic validity remains debated, with some authorities considering Epacmus a synonym of Aphoebantus.