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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Luff, M.L & Duff, A.G. | 2004 | Carabidae in: Checklist of Beetles of the British Isles. www.coleopterist.org.uk | Internet | | Details... |
| McCormack, S. | 2004 | Cyphon pubescens (Fabricius) (Coleoptera: Scirtidae), an addition to the Irish list of aquatic beetles | Journal | Ir. Nat. J. | Details... |
| McCormack, S. | 2004 | Recent records of two uncommon ground beetles (Coleoptera: Carabidae) from West Galway (H16): Leistus montanus Stephens and Chlaenius vestitus (Paykull) | Journal | Ir. Nat. J. | Details... |
| Morris, M.G. | 2004 | Curculionidae in: Checklist of beetles of the British Isles. www.coleopterist.org.uk | Internet | | Details... |
| Nelson, B. & Thompson, R. | 2004 | The natural history of Ireland's dragonflies. MAGNI publication no. 013 | Book | | Details... |
| O'Connor, J.P. | 2004 | A checklist of the Irish Eucoilinae (Hymenoptera: Figitidae) including fourteen species new to Ireland | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 2004 | Records of some rare Irish pimplines (Hymenoptera: Ichneumonidae) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 2004 | A second Irish record of Torymus chloromerus (Walker) (Hymenoptera: Torymidae) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 2004 | A second Irish record of Eurytoma mayri Ashmead (Hymenoptera: Eurytomidae) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. | 2004 | A review of the Irish gall-wasps (Hymenoptera: Cynipidae) with notes on the gall-midges (Diptera: Cecidomyiidae) and gall-mites (Acarina: Eriophyoidea) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Ashe, P. | 2004 | New records of Irish Culicidae and Dixidae (Diptera) | Journal | Ir. Nat. J. | Details... |
| O'Connor, J.P. & Wise, E.J. | 2004 | Observations on the Trichoptera of the rivers Flesk and Laune, Kilarney, Co. Kerry, Ireland | Journal | Bull. Ir. biogeog. Soc. | Details... |
| O'Connor, J.P., Dunne, R. & Whelton, A. | 2004 | Trioza vitreoradiata (Maskell) (Homoptera: Psylloidea), a New Zealand species new to Ireland | Journal | Ir. Nat. J. | Details... |
| Regan, E.C. & Anderson, R. | 2004 | Terrestrial Coleoptera recorded in Ireland, May 2003 | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Sleeman, D.P. & Smiddy, P. | 2004 | Flea (Siphonaptera) records from Irish mammals and birds | Journal | Ir. Nat. J. | Details... |
| Smiddy, P. | 2004 | Some records of rare Odonata species in east Cork and west Waterford: 2002-2003 | Journal | Ir. Nat. J. | Details... |
| Smiddy, P. & Sleeman, D.P. | 2004 | Recent records of louse-flies (Diptera: Hippoboscidae) taken in Ireland | Journal | Ir. Nat. J. | Details... |
| Smith, M.N. | 2004 | Hydroporus neglectus Schaum, 1845 (Coleoptera: Dytiscidae) new to Ireland | Journal | Ir. Nat. J. | Details... |
| Speight, M.C.D. | 2004 | Achalcus vaillanti, Hercostomus chetifer and $Trypeta artemisiae" (Diptera: Dolichopodidae & Tephritidae), insects new to Ireland | Journal | Ir. Nat. J. | Details... |
| Speight, M.C.D. | 2004 | Insect records from the Connemara (Co. galway) and Mayo (Co. Mayo) National Parks, Western Ireland | Journal | Bull. Ir. biogeog. Soc. | Details... |
4097 references found.