Epicauta conferta

Distinguished from other Epicauta species by the characteristic red markings at the corners of the otherwise black elytra. The combination of red and black patterning is distinctive within the genus. Can be separated from similar meloid beetles by the specific configuration of the red markings and overall body proportions. Confirmation may require examination of male genitalia or other microscopic features.

Medium-sized blister beetle with distinctive red and black coloration. The elytra are primarily black with red markings at the corners, giving rise to the common name 'Red-cornered Blister Beetle'. The body is elongated and somewhat soft, typical of the Meloidae family. Antennae are thread-like and moderately long. The overall color pattern serves as aposematic (warning) coloration advertising the beetle's chemical defenses.

Found in canyon woodlands, shortgrass prairie, and hackberry/bumelia/juniper woodland habitats. Associated with riparian areas and woodland edges where host plants occur. In Oklahoma, documented from Alabaster Caverns State Park in hackberry/bumelia/juniper canyon woodland.

Central America and North America. Documented from the United States (Oklahoma, Texas, and other central/southwestern states) and Mexico. GBIF records indicate presence in Middle America and North America broadly.

Adults active in late summer and early fall. Documented observations from August through October, with peak activity likely occurring in late August to September in the southern Great Plains region.

Adults have been observed feeding on fallen fruits of Sideroxylon lanuginosum (gum bumelia). Larval diet unknown but likely involves grasshopper egg pods or other soil-dwelling arthropods, as is typical for Epicauta species.

• Sideroxylon lanuginosum - food plantFallen fruits consumed by adults

Adults are diurnal and have been observed in aggregations feeding on fallen fruits. Attracted to ultraviolet/mercury vapor lights at night, suggesting nocturnal movement or dispersal behavior. When disturbed, may exhibit typical blister beetle defensive behavior involving reflex bleeding of cantharidin-containing hemolymph from leg joints.

As a blister beetle, produces cantharidin as a chemical defense. May serve as a model for mimicry complexes involving other insects. Adults function as herbivores/frugivores in the ecosystems they inhabit. Larval stages likely function as predators or parasitoids of grasshopper eggs or other ground-dwelling arthropods.

Like all blister beetles, contains cantharidin and can cause blistering if handled roughly. The species is of minor agricultural concern; some Epicauta species are known to damage crops, though specific impacts of E. conferta are not well documented. Of interest to entomologists and collectors due to its distinctive coloration.

• Epicauta pensylvanicaSimilar size and general body form, but lacks the distinctive red corner markings on the elytra; more uniformly colored black or dark brown
• Other Epicauta speciesMany Epicauta species share similar body plans but differ in color pattern; E. conferta is distinguished by the specific red-and-black pattern

• blister beetle
• Meloidae
• aposematic coloration
• cantharidin
• frugivory

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• Meloidae Holdings | Entomology Research Museum
• Psychidae | Beetles In The Bush
• Cantharidae | Beetles In The Bush
• Insecta | Beetles In The Bush | Page 3