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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Halbert, J.N. | 1919 | Lepidoptera collected in Ireland by Lieutenant R.E. Cusack | Journal | Ir. Nat. | Details... |
| Hart, W.E. | 1919 | Abnormal caterpillar of Choerocampa | Journal | Ir. Nat. | Details... |
| Johnson, W.F. | 1919 | Entomological notes from Donegal, Fermanagh and Armagh | Journal | Ir. Nat. | Details... |
| Johnson, W.F. | 1919 | Entomological notes for 1919 | Journal | Ir. Nat. | Details... |
| Moffat, C.B. | 1919 | Leucophasia sinapis in Co. Wexford | Journal | Ir. Nat. | Details... |
| Newman, L.W. | 1919 | Melitaea aurinia | Journal | Proc. Trans. S. Lond. Entomol. Nat. Hist. Soc. | Details... |
| Ruttledge, W. | 1919 | Argynnis aglaia in South Mayo | Journal | Ir. Nat. | Details... |
| Tebb, R.H.S. | 1919 | Leucophasia sinapis in Co. Wicklow | Journal | Ir. Nat. | Details... |
| Westropp, M.S.D. | 1919 | Colias edusa in Co. Cork | Journal | Ir. Nat. | Details... |
| Williams, H.B. | 1919 | Random notes from north-east Ireland | Journal | Entomol. Rec. J. Var. | Details... |
| Bonaparte-Wyse, L.H. | 1920 | Some Coleoptera and Lepidoptera from Co. Kerry | Journal | Ir. Nat. | Details... |
| Dalton, M. & Dalton, H. | 1920 | Leucophasia sinapis in Co. Dublin | Journal | Ir. Nat. | Details... |
| Greer, T. | 1920 | Lepidoptera from east Tyrone and elsewhere in 1920 | Journal | Ir. Nat. | Details... |
| Greer, T. | 1920 | The Macro-Lepidoptera of Co. Tyrone | Journal | Ent. | Details... |
| Greer, T. | 1920 | The Macro-Lepidoptera of Co. Tyrone | Journal | Ent. | Details... |
| Greer, T. | 1920 | Some Lepidoptera from east Tyrone in 1919 | Journal | Entomol. Rec. J. Var. | Details... |
| Johnson, W.F. | 1920 | Scarcity of the small tortoiseshell butterfly | Journal | Ir. Nat. | Details... |
| Johnson, W.F. | 1920 | A late Zygaena | Journal | Ir. Nat. | Details... |
| Johnson, W.F. | 1920 | Argynnis aglaia at Poyntzpass | Journal | Ir. Nat. | Details... |
| Moffat, C.B. | 1920 | Scarcity of the small tortoiseshell butterfly | Journal | Ir. Nat. | Details... |
1515 references found.