Tabanidae of Canada, east of the Rocky Mountains 1: a ...

Key to subfamilies and genera of Pangoniinae & Chrysopsinae east of
the Rocky Mountains (key reliable for females only)
Fig. 5. Vertex of
Stonemyia tranquilla (Pangoniinae)
Fig. 7. Vertex of Tabanus nigrovittatus
(Tabaninae)
Fig. 6. Hind tibia of
Chrysops excitans (Chrysopsinae) .
Fig. 8. Hind tibia of
Hybomitra nuda (Tabaninae) .
1 Three well-developed ocelli on vertex (Fig. 5). Hind tibia with apical spurs (large in
Stonemyia spp., small but just visible with a x10 hand lens in Chrysops spp. (Fig.
6), extremely small in Merycomyia).
Ocelli absent (Fig. 7) (but there is a similar-looking single raised ocellar tubercle in
Hybomitra spp.) Hind tibia without apical spurs (Fig. 8) (but such spurs present on
mid tibia).
2
CHRYSOPSINAE
and
PANGONIINAE
TABANINAE (not
included in this
key)