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
- Tenebrionidae of Wisconsin
- The Darkling Beetles of Florida and Eastern U.S.
- Wood boring Beetle Families
- Bark Beetle Genera of the United States
- Bark Beetles of the Southeastern United States
- World Genera of Xyleborini (Curculionidae: Scolytinae)
- Christmas Beetles (Scarabaeidae) of New South Wales
- Flower Chafers (Scarabaeidae) of New South Wales
- Dung Beetles (Scarabaeidae) of New South Wales
- Criocerinae (Chrysomelidae) of New South Wales
- Spilopyrinae (Chrysomelidae) of New South Wales
- Sagrinae (Chrysomelidae) of New South Wales
- Chrysomelinae (Chrysomelidae) of New South Wales
- Common Chilocorus species of India
- Genera of Morionini (Carabidae)
- Key to New World Species of Elaphrini (Carabidae)
- Weevil Biocontrol Agents for Aquatic & Terrestrial Weeds
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
Thysanoptera