Blondelia

Blondelia species are distinguished from other Blondeliini by combinations of bristle patterns on the thorax and abdomen, particularly the arrangement of dorsocentral and marginal bristles. Species-level identification requires examination of male terminalia and female ovipositor structure. The genus shares the general tachinid body plan with a robust, bristly thorax and abdomen, but specific diagnostic features for field identification to genus are not well documented in accessible literature.

Europe (including Denmark, Norway, Sweden) and North America. Specific country records include Denmark, Norway, and Sweden in Europe, with multiple species described from North America.

Adults feed on nectar and other sugar sources. Larvae are parasitoids, developing within host insects; specific host associations are documented for some species but not generalized across the genus.

• Hyphantria cunea - parasitoidBlondelia hyphantriae is a known parasitoid of the fall webworm, Hyphantria cunea (Lepidoptera: Erebidae)
• Thyridopteryx ephemeraeformis - parasitoidBlondelia eufitchiae parasitizes the evergreen bagworm, Thyridopteryx ephemeraeformis (Lepidoptera: Psychidae)
• Piniaria - parasitoidBlondelia piniariae is associated with Piniaria species (Lepidoptera: Geometridae)

Holometabolous development with egg, larva, pupa, and adult stages. Females deposit eggs or larvae directly onto or near hosts. Larvae penetrate host tissues and complete development internally, emerging to pupate in soil or leaf litter.

As parasitoids, Blondelia species contribute to population regulation of their lepidopteran hosts. They function as biological control agents for some pest moth species.

Blondelia hyphantriae and Blondelia eufitchiae have been studied as potential biological control agents for the fall webworm and bagworm, respectively, which are pests of ornamental and forest trees.

• ErynniaBoth belong to Blondeliini and share similar body proportions and bristle patterns; distinguished by details of male terminalia and ovipositor morphology
• LigeriaAnother Blondeliini genus with overlapping distribution; separation requires examination of thoracic bristle arrangement and abdominal microsculpture

• tachinidae
• parasitoid
• biological control
• lepidoptera parasitoid
• holarctic

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life