@article{Bohart2010,
  author    = {Richard M. Bohart},
  title     = {North American Pterocheilus. III. Subgenus Megapterocheilus (Hymenoptera, Eumenidae)},
  journal   = {Insecta mundi : a journal of world insect systematics},
  volume    = {10},
  number    = {1-4},
  pages     = {217 -- 224},
  year      = {2010},
}