Rhombonotus 
Round ant eater 
Rufous Net-casting Spider 
Rufous Net-casting Spider 
Runcinia grammica 
Runcinia insecta 
Rural Crab Spider 
Russian Tent Spider 
Rustic wolf spider 
Sadala rufa 
Sadala velox 
Saitis barbipes 
Sandalodes superbus 
Sassacus vitis 
Scarce Candy-striped Spider 
Schizocosa avida 
Schizocosa saltatrix 
Scimitar-horn Kitespider 
Scorpion-tailed Spider 
Scotophaeus peninsularis 
Scytodes atlacoya 
Scytodes thoracica 
Servaea incana 
Seven-spined Crab Spider