Opius downesi Gahan, 1919
See the Opius page for additional information. This is a color-variable species as indicated by the figures below.
1. Opius downesi face: ante... Opius downesi face: anterior oblique ↴
2. Opius downesi habitus: l... Opius downesi habitus: lateral ↴
3. Opius downesi habitus: later... Opius downesi habitus: lateral ↴
4. Opius downesi body: lateral... Opius downesi body: lateral ↴
5. Opius downesi win... Opius downesi wings ↴
6. Opius downesi a... Opius downesi abdomen: dorsal ↴
7. Opius downesi... Opius downesi thorax: dorsal ↴
8. Opius downesi face: anterior... Opius downesi face: anterior ↴
Taxonomic History / Nomenclature
Diagnosis and Relationships
This species is characterized by the form of the clypeus and mandibles, which are very much like those found in members of the genus Biosteres. The clypeus is large, concealing the labrum (Fig. 8 above) and the mandibles have a large basal lobe or tooth (Fig. 1 above).
Occurs all across northern U.S. and southern Canada, originally described from British Columbia.
Biology / Hosts
See AliNiazee and Brunner (1986) for suggestions for possible use in management of apple maggot in Oregon.