Megarhyssa atrata male. A. Anterior head; B. Anterior head showing color variation; C. Lateral head and mesosoma; D. Dorsal habitus; E. Lateral habitus; F. Wings.

 
 
  Part of: Pook V, Sharkey M, Wahl D (2016) Key to the species of Megarhyssa (Hymenoptera, Ichneumonidae, Rhyssinae) in America, north of Mexico. Deutsche Entomologische Zeitschrift 63(1): 137-148. https://doi.org/10.3897/dez.63.7619