Synopsis of the Families and Genera of the Hymenoptera of America, North of Mexico: Together with a Catalogue of the described Species, and Bibliography

Synopsis of the Families and Genera of the Hymenoptera of America, North of Mexico: Together with a Catalogue of the described Species, and Bibliography

Synopsis of the Families and Genera of the Hymenoptera of America, North of Mexico: Together with a Catalogue of the described Species, and Bibliography