David Richman's Site  
   Information about Arachnida research and photos of spiders and scorpions.
   http://taipan.nmsu.edu/people/richman/dbr.html

British Arachnological Society  
   Promotes study of the Arachnida, particularly spiders, pseudoscorpions, and harvestmen.
   http://www.salticus.demon.co.uk/bas/

American Arachnological Society  
   Society information, articles from recent issues of the Journal of Arachnology, graduate study program list, ask-an-expert, arachnid photos, Brown Recluse ID, and links.
   http://www.americanarachnology.org/

Arachnodata  
   Information and consulting agency for scorpions and other arachnid animals.
   http://www.arachnodata.ch/

International Society for Arachnology  
   Scientific society devoted to the study of all arachnid orders except the Acari. Disseminates information and fosters communication among arachnologists.
   http://www.arachnology.org/

Arachnology Hub  
   Index to more than 1000 web sites related to arachnids.
   http://www.arachnology.org/Arachnology/Arachnology.html