Spider identification by eye arrangement

Keys:

1. Family Lycosidae – the Wolf Spiders
2. Family Salticidae – the Jumping Spiders
3. Family Salticidae, genus Lyssomanes – the Magnolia Green Jumpers
4. Family Araneidae – the Orbweavers
5. Family Pisauridae, genus Dolomedes – the Fishing Spiders
6. Family Pisauridae, genus Pisaurina – the Nursery Web Spiders
7. Family Ctenidae – the Wandering Spiders
8. Family Oxyopidae – the Lynx Spiders
9. Family Philodromidae – the Running Crab Spiders
10. Family Dysderidae – the Woodlouse Hunters
11. Family Tetragnathidae, genus Tetragnatha – the Longjawed Orbweavers
12. Family Thomisidae, genus Xysticus – the Ground Crab Spiders
13. Family Agelenidae, genus Eratigena – the Funnel Weavers
14, Family Agelenidae, genus Agelenopsis – the Grass Spiders (aka Funnel Weavers)
15, Family Selenopidae, genus Selenops – the Flatties (aka Crab Spiders)
16. Family Sparassidae, genus Heteropoda – the Huntsman (aka Giant Crab Spiders)
17. Family Sparassidae, genus Olios – Giant Crab Spiders (aka Huntsman)
18. Family Sicariidae, genus Loxosceles – the Brown Spiders (includes the Brown Recluse)
19. Family Uloboridae, genus Hyptiotes – the Triangle Weavers
20. Family Zoropsidae, species Zoropsis spinimana – the False Wolf Spider
21. Family Deinopidae, species Deinopis spinosa – the Net-casting Spider (aka Ogre-faced Spider); note that the four other eyes are not visible from the front.
22. Family Diguetidae, genus Diguetia – the Desertshrub Spiders
23. Family Antrodiaetidae, genus Antrodiaetus – the Folding-door Spiders (aka Turret Spiders); these are primitive spiders (mygalomorphs).
24. Family Segestriidae – the Tube Web Spiders
25. Family Scytodidae – the Spitting Spiders

Source: http://www.spiders.us/articles/identification/ , Go ahead, BUG me
Artist: Mandy Howe