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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Rourke, F.J. | 1940 | Notes on the ant fauna of Howth, County Dublin | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1943 | Early appearance of bumble bees | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1945 | Method used by wasps of the genus Vespa in killing prey | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1946 | The discovery of the rare ant, Stenamma westwoodi Westwood, in Co. Wicklow | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1950 | Ants as beneficial insects | Book | | Details... |
| O'Rourke, F.J. | 1955 | Bombus pratorum L. in County Cork | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1956 | The Bombidae of County Cork | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1957 | Bombus distinguendus Mor. one of the rarer Irish bumble bees | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1969 | Tabanus bromius L., a bloodsucking fly new to Ireland with notes on the species of Tabanus recorded from Ireland | Journal | Ir. Nat. J. | Details... |
| Oehlke, J. | 1967 | Westpalaarktische Ichneumonidae. 1: Ephialtinae | Journal | Hymenopt. Cat. | Details... |
| Orr, H.L. | 1909 | Hymenoptera from County Antrim and Down | Journal | Ir. Nat. | Details... |
| Orr, H.L. | 1909 | Hymenoptera in Ulster and Connaught | Journal | Ir. Nat. | Details... |
| Orr, H.L. | 1911 | Hymenoptera from Ulster | Journal | Ir. Nat. | Details... |
| Orr, H.L. | 1925 | Notes on aculeates in possession of W.F. Johnson | Unpublished | | Details... |
| Pack-Beresford, D.R. | 1899 | Wasp notes | Journal | Ir. Nat. | Details... |
| Pack-Beresford, D.R. | 1901 | The male of Vespa austriaca | Journal | Ir. Nat. | Details... |
| Pack-Beresford, D.R. | 1902 | The nesting habits of Vespa rufa | Journal | Ir. Nat. | Details... |
| Pack-Beresford, D.R. | 1902 | Vespa austriaca | Journal | Ir. Nat. | Details... |
| Pack-Beresford, D.R. | 1903 | Notes on wasps | Journal | Ir. Nat. | Details... |
| Pack-Beresford, D.R. | 1903 | Hibernation of queen wasps | Journal | Ir. Nat. | Details... |
599 references found.