Below is a working checklist of Mount Desert Island's mayflies. Please send corrections and updates to info@vfthomas.com. Photographs are welcome. Thank you.
| Family | Genus | Specific Epithet | authority | common name | Source (full citation given after this table) |
| Ameletidae [see note 2 below] |
Ameletus | ludens | Needham | ? | Bar Harbor: Procter (1946, p. 46., [see note 3 below]) |
| Baetidae | Acerpenna | pygmaea | (Hagen) | ? | Bar Harbor: Procter (1946, p. 46., "Duck Brook") as Baetis pygmaeus |
| Baetidae | Baetis | pluto | McDunnough | ? | Bar Harbor: Procter (1946, p. 46., "Duck Brook") |
| Baetidae | Callibaetis | ferrugineus ssp. ferrugineus | (Walsh) | ? | Bar Harbor: Procter (1946, p. 46.) as Callibaetis ferrugineus |
| Baetidae | Callibaetis | ferrugineus ssp. hageni | (Walsh) / Eaton | ? | Bar Harbor: Procter (1946, p. 46., "The Tarn", "Great Heath" [see note 1 below]) as Callibaetis americana and Callibaetis hageni |
| Baetidae | Callibaetis | fluctuans | (Walsh) | ? | town not given: Procter (1946, p. 46.) |
| Baetidae | Procloeon | rubropictum | (McDunnough) | ? | Mount Desert: Procter (1946, p. 46., "Echo Lake") as Cloeon rubropictum |
| Caenidae | Caenis | amica | Hagen | ? | Bar Harbor: Procter (1946, p. 46., "Great Heath" [see note 1 below]) |
| Ephemerellidae | Ephemerella | dorothea ssp. dorothea | (Needham) | ? | town not given: Procter (1946, p. 45.) |
| Ephemerellidae | Eurylophella | funeralis | (McDunnough) | ? | Bar Harbor: Procter (1946, p. 45., "Witches Hole") as Ephemerella funeralis |
| Ephemerellidae | Eurylophella | temporalis | (McDunnough) | ? | Bar Harbor: Procter (1946, p. 45., "Duck Brook", "Hulls Cove") as Ephemerella temporalis Mount Desert: Procter (1946, p. 45., "Echo Lake") as Ephemerella temporalis |
| Ephemerellidae | Serratella | deficiens | (Morgan) | ? | Bar Harbor: Procter (1946, p. 45., "Duck Brook") Mount Desert: Procter (1946, p. 45., "Ripple Pond outlet") as Ephemerella deficiens |
| Ephemeridae | Ephemera | simulans | Walker | ? | Mount Desert: Procter (1946, p. 44., "Echo Lake") |
| Heptageniidae | Epeorus | fragilis | (Morgan) | ? | Bar Harbor: Procter (1946, p. 47., "Hulls Cove Brook") as Iron fragilis |
| Heptageniidae | Epeorus | pleuralis | (Banks) | ? | Bar Harbor: Procter (1946, p. 47.) as Iron pleuralis |
| Heptageniidae | Epeorus | vitreus | (Walker) | ? | Bar Harbor: Procter (1946, p. 47., "Duck Brook") as Iron vitrea |
| Heptageniidae | Leucrocuta | hebe | (McDunnough) | ? | Bar Harbor: Procter (1946, p. 47., "Duck Brook") as Heptagenia hebe |
| Heptageniidae | Maccaffertium | mediopunctatum ssp. mediopunctatum | (McDunnough) | ? | Bar Harbor: Procter (1946, p. 47., "Duck Brook") as Stenonema mediopunctatum |
| Heptageniidae | Maccaffertium | modestum | (Banks) | ? | Bar Harbor: Procter (1946, p. 47., "Duck Brook") as Stenonema rubromaculatum and Stenonema rubrum |
| Heptageniidae | Maccaffertium | vicarium | (Walker) | ? | Bar Harbor: Procter (1946, p. 47.) as Stenonema fuscum |
| Heptageniidae | Stenacron | interpunctatum | (Say) | ? | Bar Harbor: Procter (1946, p. 47., "Eagle Lake") as Stenonema canadense and Stenonema interpunctata |
| Heptageniidae | Stenonema | femoratum | (Say) | ? | town not given: Procter (1946, p. 47.) as Stenonema tripunctatum |
| Leptophlebiidae | Choroterpes | basalis | (Banks) | ? | Southwest Harbor: Procter (1946, p. 45.) |
| Leptophlebiidae | Habrophlebia | vibrans | Needham | ? | Bar Harbor: Procter (1946, p. 45., "Duck Brook") |
| Leptophlebiidae | Habrophlebiodes | americana | (Banks) | ? | Bar Harbor: Procter (1946, p. 45., "Duck Brook") |
| Leptophlebiidae | Leptophlebia | cupida | (Say) | ? | Tremont: Procter (1946, p. 45., "Bald Mt.") as Leptolebia cupidus |
| Leptophlebiidae | Leptophlebia | johnsoni | McDunnough | ? | Bar Harbor: Procter (1946, p. 45.) as Leptolebia johnsoni |
| Leptophlebiidae | Leptophlebia | nebulosa | (Walker) | ? | town not given: Procter (1946, p. 45., "record of capture lost") as Leptolebia nebulosis |
| Leptophlebiidae | Paraleptophlebia | debilis | (Walker) | ? | Bar Harbor: Procter (1946, p. 45., "Great Heath" [see note 1 below]) |
| Leptophlebiidae | Paraleptophlebia | mollis | (Eaton) | ? | town?: Procter (1946, p. 45., "Duck Pond") |
| Leptophlebiidae | Paraleptophlebia | volitans | (McDunnough) | ? | Bar Harbor: Procter (1946, p. 45., "Duck Brook") Mount Desert: Proctor (1946, p. 45., "Echo Lake", "Ripple Pond outlet") |
| Siphlonuridae | Siphlonurus | mirus | (Eaton) | ? | Bar Harbor: Procter (1946, p. 46., "Green Mt." [now called Cadillac Mountain]) |
| Siphlonuridae | Siphlonurus | quebecensis | (Provancher) | ? | town not given: Procter (1946, p. 46.) |
| Siphlonuridae | Siphlonurus | typicus | (Eaton) | ? | Bar Harbor: Procter (1946, p. 46.) |