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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Nicholson, G.W. | 1920 | Longitarsus castaneus, Duft. - a correction | Journal | Ir. Nat. | Details... |
| Nicholson, G.W. | 1920 | Coleoptera from County Cavan | Journal | Ir. Nat. | Details... |
| Nilsson, A.N. | 1995 | The aquatic Adephaga (Coleoptera) of Fennoscandia and Denmark. II. Dytiscidae | Journal | Fauna Entomol. Scand. | Details... |
| O'Callaghan, D.P. | 1982 | Occurrence of the small elm bark beetle, Scolytus multistriatus, in Ireland | Journal | Ir. Nat. J. | Details... |
| O'Carroll, N. & De Brit, G. | 1966 | Chemical control of the large pine weevil (Hylobius abietis L.) | Book | | Details... |
| O'Connor, J.P. | 1993 | Review: 'Weevils' by M.G. Morris | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 1999 | Review: 'Pollen beetles Coleoptera: Kateretidae and Nitulidae' by A.H. Kirk-Spriggs | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 1999 | A sixth Irish record of Metoecus paradoxus (L.) (Coleoptera: Rhipiphoridae) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 1999 | Cyphon phragmiteicola Nyholm (Scirtidae) new to Ireland | Journal | Coleopterist | Details... |
| O'Connor, J.P. & Nash, R. | 1979 | Records of six insect species (Coleoptera: Orthoptera) recently imported into Ireland | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Nash, R. | 1981 | Notes on five species of insect (Hemiptera: Coleoptera) recently imported into Ireland | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Nash, R. | 1982 | Further records of insects (Dictyoptera, Lepidoptera, Coleoptera, Diptera) imported into Ireland | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Nash, R. | 1983 | Insects imported into Ireland 5. Records of Orthoptera, Hemiptera, Hymenoptera and Coleoptera | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Nash, R. | 1984 | Insects imported into Ireland 6. Records of Orthoptera, Dermaptera, Lepidoptera and Coleoptera | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Nash, R. | 1986 | Insects imported into Ireland 8. Records of Hemiptera, Coleoptera, Diptera and Lepidoptera | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & O'Neill, L. | 1985 | A record of Dytiscus circumflexus Fabricius (Coleoptera) from Co. Wexford | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Rigney, S. | 1991 | A second Wexford record of Pyrochroa serraticornis (Scopoli) (Coleoptera) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P., Winter, T.G. & Good, G.A. | 1991 | A review of the Irish Scolytidae (Insecta: Coleoptera) | Journal | Ir. Nat. J. | Details... |
| O'Mahony, E. | 1924 | Records for Choleva nigrita, Cassida nobilis and other beetles in Co. Dublin | Journal | Ir. Nat. | Details... |
| O'Mahony, E. | 1924 | Athous difformis Lac. and other beetles in Co. Dublin | Journal | Ir. Nat. | Details... |
753 references found.