Madremyia

As a genus within Tachinidae, Madremyia species share the family's characteristic bristly body and single pair of wings. Specific diagnostic features distinguishing Madremyia from related tachinid genera are not documented in available sources.

Forest habitats, particularly spruce-fir forests where host species such as the spruce budworm occur.

North America. Distribution records from GBIF indicate presence in Norway (SE) and unknown (NO), though these may represent data artifacts rather than confirmed native range.

• Choristoneura fumiferana - parasitoidspruce budworm; larval parasitoid documented for M. saundersii

Madremyia saundersii deposits macrotype eggs on the integument of host larvae. First stage larvae penetrate the host integument and attach to tracheal trunks, remaining there through the second stage. During the third feeding stage, larvae wander freely within the host body. Development from egg deposition to adult emergence requires 17–23 days under laboratory conditions.

Biological control agent; parasitoid of forest pest Lepidoptera. Madremyia saundersii has been studied and released in eastern Canada as part of spruce budworm management programs.

Used in biological control efforts against the spruce budworm, an economically important defoliator of spruce and fir forests. The species was obtained and released in infested areas of eastern Canada during the mid-20th century.

• Other Tachinidae genera in EryciiniShares tribe Eryciini; precise differentiation requires examination of specific morphological characters not detailed in available sources

• tachinid
• parasitoid
• forest
• biological control
• spruce budworm

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• STUDIES ON DIPTEROUS PARASITES OF THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEM.) (LEPIDOPTERA: TORTRICIDAE): IV. MADREMYIA SAUNDERSII (WILL.) (DIPTERA: TACHINIDAE)