Enicospilus flavostigma

Distinguished from similar orange ichneumon wasps in the genus Netelia (subfamily Tryphoninae) by its shorter ovipositor and generally larger size. Netelia females possess a noticeably longer ovipositor used to puncture caterpillar hosts and lay stalked eggs. Enicospilus can be separated from other Ophioninae genera by wing venation patterns and details of the ocellar arrangement. Identification to species level requires examination of wing venation and other minute morphological features.

Found in varied terrestrial habitats where lepidopteran hosts are present. Adults are frequently observed at artificial light sources at night. The species likely inhabits open woodlands, forest edges, and agricultural areas where host caterpillars feed.

Recorded from Brazil (states of Bahia, Minas Gerais, Mato Grosso, Rio de Janeiro, Rio Grande do Norte, Santa Catarina, and São Paulo). The genus Enicospilus has a cosmopolitan distribution with many species found across multiple continents.

Adults are active year-round in tropical regions. Nocturnal activity peaks during warmer months when host caterpillars are abundant.

• Lepidoptera - parasitoidLarvae are koinobiont ectoparasitoids of caterpillars

Females locate caterpillar hosts and lay eggs externally. The wasp larva hatches and remains attached to its egg stalk via specialized posterior bristles, feeding on the host as an external parasite without arresting its development (koinobiosis). The host caterpillar continues to grow and feed normally while the wasp larva develops. Pupation occurs outside the host or in the soil.

Strictly nocturnal. Adults are strongly attracted to artificial light sources, often appearing at porch lights and indoor lighting. Flight is somewhat erratic and bouncing. When disturbed or trapped against skin or clothing, females may sting defensively. The sting is painful but not medically significant for most people.

Biological control agent regulating populations of moth and butterfly caterpillars. As a koinobiont ectoparasitoid, it allows host development to continue while consuming the host, potentially reducing damage to vegetation by preventing caterpillars from reaching reproductive maturity.

Occasional nuisance when attracted to outdoor and indoor lighting. Females can deliver a painful sting if handled carelessly or trapped against skin. Multiple anecdotal reports document unprovoked stinging incidents, particularly when wasps enter homes and contact sleeping humans. Not known to cause severe allergic reactions in most individuals, though localized pain and swelling are common. No nest-building or colonial behavior; individual wasps do not represent an infestation.

• NeteliaSimilar orange coloration and nocturnal light-seeking behavior, but Netelia has a conspicuously longer ovipositor and belongs to subfamily Tryphoninae
• Other Ophioninae generaShare short ovipositor and nocturnal habits but differ in wing venation, ocellar details, and body proportions

• ichneumon wasp
• parasitoid
• nocturnal
• orange wasp
• koinobiont
• biological control
• light-attracted

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Bug Eric: Wasp Wednesday: Netelia