Robber Flies
Asilidae of Goodwell and Texhoma
Texas Co. Oklahoma

Efferia wings quick reference

Wings with three submarginal cells

Leads towards E. luna


Wings with two submarginal cells


Female ovipositor divided at tip; male abdominal male abdominal segments 6-7 whitish

leads towards E. pogonas and E. helenae


Female ovipositor not divided at tip; male abdominal segment grayish, often with long white parted hairs.


Wings with Furcation of R1 and R2 (large arrow) separated before crossvein (small arrow}

leads towards E. argentifrons and E. pallidula


Wings with Furcation of R1 and R2 (large arrow} separated beyond crossvein {small arrow}


Vein R5 curves backwards to meet costa at or before wing tip

lrads toward E. aestuans and E. kansensis


Vein R5 curves backwards to meet costa at or after wing tip wing tip

Leads toward E. snowi, E. loucocoma, and E. albibarbis