Adult female (left), egg (top right), first instar (middle right), and last instar Oomyzus brevistigma, a pupal parasite of elm leaf beetle, Xanthogaleruca luteola.

Figure, line art illustrations. Adult female (left), egg (top right), first instar (middle right), and last instar, a pupal parasite of elm leaf beetle, Credit: Mary F. Benson In Berry PA 1938. United States Department of Agriculture Circular 485
Credit: Mary F. Benson In Berry PA 1938. United States Department of Agriculture Circular 485