Cresson, E. T. 1887. I. Synopsis of the families and genera of the Hymenoptera of America North of Mexico. II. Catalog of species and bibliography Transactions of the American Entomological Society, Supplementary Volume 4:155-351
Cresson, E. T. 1887. I. Synopsis of the families and genera of the Hymenoptera of America North of Mexico. II. Catalog of species and bibliography Transactions of the American Entomological Society, Supplementary Volume 4:155-351