9. Eyes in more or less circular arrangement 

 Dysderidae Dysderids 

 With three groups of two eyes each 

 Segestriidae Segestriids 



10. Ends of legs with two claws and usually a bunch of hairs 11. 

 Ends of legs with three claws and usually no bunch of hairs 20. 



11. With six eyes (all white) 



Sicariidae Sicariids 

 (Scytodidae) 

 Usually with eight eyes 12. 



12. Eyes in three (rarely four) rows (4'2'2 or 2'4'2) 13. 

 Eyes in two rows (4-4 or 6-2) 16. 



13. Chelicera very large with a slender claw about as long as the basal por* 



tion; damp and dark places in the south 

 Prodidomidae Prodidomids 

 Chelicera moderate; claw shorter 14. 



14. Eyes in three or four rows, the last row situated one-third to onchalf 



way back from the front of the cephalothorax 

 Saltiadae Jumping Spiders 

 (Attidae) 

 Eyes in three rows on the front of the cephalothorax 15« 



15. Eye formula 4-2 '2 



Zodariidae Zodariids 

 Eye formula 2-4-2 



Ctemdae Wandering Spiders 



16. First pair of spinnerets long and well apart; legs about equal 



Drassodidae Drassodids 

 (Drassidae) 

 First pair of spinnerets close together 17. 



17. Legs about equal; inner margin of groove of chelicera toothed 



Clubionidae Clubionids 

 First two pairs of legs larger than the others and directed sideways, or 

 inner margin of groove of chelicera smooth, or both Crab Spiders 18. 



18. Inner margin of groove of chelicera smooth; widely distributed 



Thomis^dae Crab Spiders 

 Inner margin of groove of chelicera toothed; tropical species 19. 



19. Eye formula 6-2 (six eyes in first row, two in second row) 



Selenopidae Tropical Crab Spiders 

 Eye formula 4-4 



Eusparassidae Giant Crab Spiders 

 (Sparassidae) 

 (Heteropodidae) 



20. With six spinnerets in one transverse row 



Hahnudae Hahniids 

 With six spinnerets normally arranged or rarely with only two spinner' 

 ets 21. 



211 



