Black-banded Crab Spider 
Black-footed yellow sac spider 
Black-legged Nephila 
Black-striped orchard spider 
Blacklegged Tick 
Blacktail Wolf Spider 
Blacktailed red sheetweaver 
Blue Bush Orb Weaver 
Blue Mountains funnel-web spider 
Blunt-spined kite spider 
Bold Jumping Spider 
Bordered Orbweaver 
Boreal Combfoot 
Bothriurus asper 
Bowl and doily spider 
Box Elder Pouch Gall Mite 
Brazilian black tarantula 
Brazilian Salmon Pink Bird-eating Tarantula 
Brazilian wandering spider 
Brazilian yellow scorpion 
Brettus adonis 
Brettus cingulatus 
Brigittea latens 
Brilliant Jumping Spider