Entomology Practice Test 2026 – Morphology, Behavior, Evolution, and Pest Management

Spanish fly refers to a blister beetle that produces cantharidin, a potent blistering compound. The correct scientific name and family are Lytta vesicatoria, a member of the Meloidae family within the order Coleoptera. This fits because Lytta is a well-known blister beetle genus, and vesicatoria is the species most traditionally associated with the Spanish fly. The other options mix up the genus or place the insect in the wrong family (for example, longhorn beetles in Cerambycidae or soldier beetles in Cantharidae), which does not align with the blister beetle group that produces cantharidin.