Glenurus luniger

Adults are distinguished from other antlions by the bold black, white, and pink patterning on the wingtips. The clubbed antennae separate all antlions from damselflies and dragonflies, which have long, thread-like antennae. Among antlions in its range, the distinctive wing pattern separates Glenurus luniger from the pit-digging Myrmeleon species and other genera. Larvae of Glenurus do not construct the classic funnel-shaped pits characteristic of Myrmeleon; instead they bury themselves just below the soil surface and wait for prey.

Larvae inhabit dry, sandy or powdery soils, often in sheltered locations such as beneath rock overhangs, at the base of trees, under bridges, or in the dirt floors of old barns and sheds. These sites remain perpetually dry. Adults are found among tall grasses and vegetation, particularly at dusk.

Recorded from Central America and North America. Within North America, observations include Arizona and other southwestern states. The species occurs in the southern United States and extends southward through Central America.

Adults are most frequently observed at dusk and are attracted to lights at night. Activity patterns for larvae are continuous where conditions remain suitable, as they remain buried in soil year-round until pupation.

Eggs are laid in sandy soil. Larvae develop underground, burying themselves just below the surface to ambush prey rather than constructing pits. Upon completing development, larvae spin silken cocoons underground, incorporating grains of sand, and pupate within. Adults emerge from these subterranean pupal chambers.

Adults are strongly cryptic: when alighting on grass stems or twigs, they align their bodies to flatten seamlessly against the substrate, rendering them nearly invisible. They fly clumsily. Larvae are sit-and-wait predators that detect prey through vibrations and flick sand to dislodge victims that contact the soil surface above them. When capturing prey, larvae inject enzymes through hollow mandibles to paralyze and externally digest the victim, then imbibe the liquefied tissues and eject the dry carcass.

Larvae function as subterranean predators of small ground-dwelling arthropods including ants, beetles, and other insects. They contribute to soil turnover through their burrowing activities. Adults may consume soft-bodied insects and pollen, though feeding habits remain poorly documented.

Larvae can be maintained in captivity in containers of fine sand with periodic feeding of ants and other small invertebrates. The species contributes to general antlion lore and educational interest due to the dramatic predatory behavior of larvae and the striking appearance of adults. No economic impact documented.

• Myrmeleon speciesMyrmeleon larvae construct classic funnel-shaped pits in sandy soil, while Glenurus luniger larvae bury themselves without digging pits. Myrmeleon adults lack the distinctive black, white, and pink wingtip patterning of Glenurus.
• Scotoleon speciesScotoleon males have extremely elongated abdomens with prominent claspers, more exaggerated than in Glenurus. Scotoleon adults lack the bold wingtip coloration of Glenurus luniger.
• Vella speciesVella are true giants among antlions with wingspans of 100-120 mm or more, substantially larger than Glenurus luniger. Vella adults lack the distinctive wingtip patterning.

• antlion
• Myrmeleontidae
• Neuroptera
• picture-winged
• predatory larvae
• cryptic adult
• North America
• Central America
• dry soil habitat

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Bug Eric: "Doodlebugs" (Antlions)
• Pits of despair for ground dwelling insects: Antlions, Family Myrmeleontidae — Bug of the Week