1 Allostemma, female (USNMENT00764972), head, mesosoma, metasoma and ovipositor, lateral view 2 Allostemma burnneum, female (OSUC334187), head, mesosoma, metasoma and ovipositor, lateral view. Scale bars in millimeters.

 
 
  Part of: Talamas EJ, Buffington ML (2015) Fossil Platygastroidea in the National Museum of Natural History, Smithsonian Institution. Journal of Hymenoptera Research 47: 1-52. https://doi.org/10.3897/JHR.47.5730