Common blue butterfly, Polyommatus icarus, on lavender Credit Hayley Wiswell
Common blue butterfly, Polyommatus icarus, on lavender Credit Hayley Wiswell

The Royal Entomological Society have published handbooks for the identification of insects since 1949. Many are now also available as ebooks.

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Fungus gnats (Diptera: Mycetophilidae, Mycetophilinae)

Cover of Blow flies (Diptera: Calliphoridae, Polleniidae, Rhiniidae)

Blow flies (Diptera: Calliphoridae, Polleniidae, Rhiniidae)

Cover of Psocids Psocoptera (Booklice and barklice) RES Handbook

Psocids Psocoptera (Booklice and barklice)

Cover of Fleas (Siphonaptera) RES Handbook

Fleas (Siphonaptera)

Cover of The Adult Trichoptera (Caddisflies) of Britain & Ireland RES Handbook

The Adult Trichoptera (Caddisflies) of Britain & Ireland

Cover of Psylloidea (Nymphal stages) Hemiptera, Homoptera RES Handbook

Psylloidea (Nymphal stages) Hemiptera, Homoptera

Cover of Aphids - Pterocommatinae and Aphidinae (Aphidini) RES Handbook

Aphids – Pterocommatinae and Aphidinae (Aphidini)

Cover of Aphids - Aphidinae (Macrosiphini)

Aphids – Aphidinae (Macrosiphini)

Cover of Aphids – Anoeciinae, Lachninae, Eriosomatinae, Phloeomyzinae, Thelaxinae, Hormaphidinae, Mindarinae RES Handbook

Aphids – Anoeciinae, Lachninae, Eriosomatinae, Phloeomyzinae, Thelaxinae, Hormaphidinae, Mindarinae

Cover of British Coleoptera larvae. A guide to the families and major subfamilies. RES Handbook.

British Coleoptera larvae. A guide to the families and major subfamilies

Cover of The Carabidae (ground beetle) of Britain and Ireland RES Handbook

The Carabidae (ground beetle) of Britain and Ireland

Keys to adults of the water beetles of Britain and Ireland (Part 1)