American Arachnological Society
http://www.americanarachnology.org/

American Entomological Society
http://www.acnatsci.org/hosted/aes/

Crustacean Society
http://www.vims.edu/tcs/

Entomological Society of America
http://www.entsoc.org

Royal Entomological Society
http://www.royensoc.co.uk/