Anthomyiidae:
Fucellia
Fucellia maritima (Haliday, 1838) - A Seaweed fly
Chironomidae:
Halocladius
Halocladius variabilis (Staeger, 1839) - A Marine midge
Telmatogeton
Telmatogeton japonicus Tokunaga, 1933
- A Marine splash midge (non-native species)
Thalassomya
Thalassomya frauenfeldi Schiner, 1856
- A Marine splash midge
Bloodworms (chironomidae) - Non-biting midge,
marine splash midge / chironomid larvae
Coelopidae:
Coelopa
Coelopa (Fucomyia) frigida (Fabricius, 1805)
- A Kelp or Wrack fly
Culicidae:
Culex
Culex pipiens Linnaeus, 1758 - Northern House Mosquito
Dolichopodidae:
Liancalus
Liancalus virens (Scopoli, 1763) - A Long-legged fly
Sphaeroceridae:
Thoracochaeta
Thoracochaeta zosterae (Haliday, 1833) - A Seaweed fly
Syrphidae:
Eristalinus
Eristalinus aeneus (Scopoli, 1763)
- Large Spotty-eyed Dronefly
Strandline fly maggots washed up at Marazion
Fly maggot and pupae at Spit Point Cornwall
Fly maggots in driftwood at Penzance
Beetles (Coleoptera)
Aepus
Aepus marinus (Stroem, 1788)
- A marine carabid beetle
Aepus robinii (Laboulbène, 1849)
- A marine carabid beetle
Amara
Amara aenea (De Geer, 1774) - Common Sun Beetle
Bledius
Bledius unicornis (Germar, 1825) - A Rove Beetle
Cafius
Cafius xantholoma (Gravenhorst, 1806)
- A staphylinid or Rove Beetle
Cercyon
Cercyon depressus Stephens, 1829
- A Water Scavenger Beetle
Cillenus
Cillenus lateralis (Samouelle, 1819)
- A carabid or ground beetle
Enochrus
Enochrus halophilus (Bedel, 1878)
- A Water Scavenger Beetle
Heterocerus
Heterocerus fenestratus (Thunberg, 1784)
- A Variegated Mud-loving or heterocerid beetle
Necrodes
Necrodes littoralis (Linnaeus, 1758)
- Shore Sexton Beetle
Ochthebius
Ochthebius marinus (Paykull, 1798)
- Marine moss beetle
Paranchus
Paranchus albipes (Fabricius, 1796)
- A carabid or Ground Beetle
Unidentified Staphylinid / Rove beetle - Marazion 11.11.14.
Butterflies, moths and micro-moths (Lepidoptera)
Moths
Noctuidae
Autographa
Autographa gamma (Linnaeus, 1758) - Silver Y
Lacanobia
Lacanobia oleracea (Linnaeus, 1758)
- Bright-line Brown-eye
Micro-moths
Lobesia
Lobesia littoralis (Humphreys & Westwood, 1845)
- Shore Doubtful Marble Moth
Other arthropods, see -
Sea spiders (Pycnogonida)
Spiders, mites and pseudoscorpions (Arachnida)
Sea slaters, Woodlice and Pill bugs (Isopoda)
Mud shrimps and Sandhoppers (Amphipoda)