General
- Aquatic Insects of New Hampshire
- Canadian Journal of Arthropod Identification
- Discover Life
- Identify Life
- Iowa State Index of Internet Resources: Keys
- Key to Insect Orders
- Pests of Cultivated Palms
- Australian Aquatic Invertebrates
- Key to Cotton Insects
Arachnida
Coleoptera
- Beetles of the World
- Wood Boring Beetle Resource
- LongicornID: Longhorned beetle subfamilies and tribes (Cerambycidae)
- CerambycID: Longhorned beetle pests and conifer feeders to genus, Monochamus (Cerambycidae)
- Bark Beetle Genera of the United States (Curculionidae: Scolytinae)
- Bark Beetles of the Southeastern United States (Curculionidae: Scolytinae)
- World Genera of Xyleborini (Curculionidae: Scolytinae)
- Key to the world species of Ips (Curculionidae: Scolytinae)
- IroncladID: key to adult Ironclad and Cylindrical Bark Beetles (Zopheridae)
- Lampyrid-ID: Key to the world genera of fireflies (Lampyridae)
- Diabrotica ID (Chrysomelidae)
- Hispines of the World (Chrysomelidae)
- Key to the click beetle genera of Canada and USA (Coleoptera: Elateridae)
- Hawaiian Scarab ID: Scarab and Stag Beetles of Hawaii and the Pacific (Scarabaeidae)
- Key to New World Diplotaxini genera and to Brazilian Liogenys species (Scarabaeidae: Melolonthinae)
- Carpophiline-ID: key to the carpophiline sap beetles of Eastern North America (Nitidulidae)
- MonotomidGen: key to the New World genera of Monotomidae
- Christmas Beetles (Scarabaeidae) of New South Wales
- Flower Chafers (Scarabaeidae) of New South Wales
- Dung Beetles (Scarabaeidae) of eastern New South Wales
- Dung Beetles (Scarabaeidae) of eastern New South Wales (subkeys)
- Criocerinae (Chrysomelidae) of New South Wales
- Spilopyrinae (Chrysomelidae) of New South Wales
- Sagrinae (Chrysomelidae) of New South Wales
- Chrysomelinae (Chrysomelidae) of New South Wales
- Canada stored product beetles
Diptera
- Calliphoridae do Brasil (in Portuguese)
- Key to World Ectyphinae (Mydidae) species
- Invasive Crane flies of the Northeastern United States
- Liriomyza Parasitoids of Southeast Asia
- Stiletto-flies of Australasia (Diptera: Therevidae)
- Mosquitoes of New Zealand
- CulicID: Adult Female Mosquitoes of Queensland
- Drosophiladel Ecuador (Spanish)
Hemiptera
- Armored Scales of the World
- Whitefly Pupae of the World
- Australian Soft Scale (Coccidae) Genera
- Interactive Key to Aphis in Midwestern United States
- Families of Heteroptera Australia
- Stink Bugs (Pentatomidae) of Australia
- Lace Bugs (Tingidae) of Australia
- Scale Insects of Quarantine Significance
- Illustrated Interactive Keys for identifying Treehoppers
Hymenoptera
- Pacific Invasive Ant Key (PIAKey)
- Australian Cynipoidea
- World Genera of Eulophidae Parasitoids of Leafmining Agromyzidae
- World Species Groups of Leucospis (Hymenoptera: Leucospidae)
- Ant subfamilies of Madagascar
Lepidoptera
Neuroptera
- Key to the Psychopsidae (Insecta: Neuroptera) Genera of the World
- Larvae of Corydalidae (Megaloptera) of California
Orthoptera
- Grasshoppers: Their Biology, Identification and Management
- Grasshoppers of the Western United States
Thysanoptera