Chalcoela pegasalis

Walker, 1859

wasp parasitizer moth

Chalcoela pegasalis, commonly known as the parasitizer , is a small pyralid moth in the Crambidae. The was described by Francis Walker in 1859. It is notable for its lifestyle, with larvae developing inside the nests of paper wasps (Polistes species). The moth occurs across the Caribbean and eastern North America, with active during the warmer months.

Chalcoela pegasalis by AmaryllisGardener. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Chalcoela pegasalis: //ˌkælkəʊˈiːlə ˌpɛɡəˈseɪlɪs//

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Identification

The can be distinguished from its Chalcoela iphitalis (the sooty-winged chalcoela) by geographic range and subtle morphological differences, though detailed diagnostic features are not well documented in available sources. are small typical of the Glaphyriinae. The " parasitizer moth" is shared with related species in the , so confirmation of identity may require examination of genitalia or molecular analysis.

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Habitat

Associated with the nests of paper wasps (Polistes ), typically in sheltered locations such as under eaves of buildings, in trees, or on man-made structures. The 's is thus defined by the nesting sites of its rather than independent environmental preferences.

Distribution

Caribbean region (Cuba, Jamaica, French Antilles, Puerto Rico) and eastern North America from southern Ontario and Maryland south to Florida, west to Texas, and north to Illinois.

Seasonality

are on wing from May to September.

Host Associations

Polistes - larval Larvae are of Polistes larvae, developing inside paper wasp nests

Life Cycle

Females lay on or near paper wasp nests; larvae enter nest and feed as on larvae. occurs within the wasp nest.

Behavior

females approach nests at night when adult wasps are less alert. Larvae produce silk webbing within nests, which may serve as a clue to their presence.

Ecological Role

Acts as a regulating of paper wasps (Polistes ). The species occupies a specialized trophic as one of the few known parasitoids of social . May also serve as for ichneumon wasps such as Calliephialtes grapholithae, though this association is documented for the C. iphitalis and requires confirmation for C. pegasalis.

Human Relevance

Occasional nuisance when infesting paper wasp nests near human habitation. The has been studied for its unusual . Citizen science observations have helped clarify its distribution.

Similar Taxa

Chalcoela iphitalisCongeneric with similar as of Polistes ; C. iphitalis is more commonly documented in North American literature and may overlap in range

More Details

Taxonomic history

The was described by Francis Walker in 1859 and has remained in the Chalcoela, though placement has shifted from Pyralidae to Crambidae following modern classifications.