x LIST OF ILLUSTRATIONS 



PLATE FACING PAGE 



b Door half open 1 1 1 



c Door closed 1 1 1 



17. Black widow, Latrodectus mactans, with egg sac 124 



1 8. Shamrock orb weaver, Aranea trifolium, on flower 125 



19. Banded Argiope, Argiope trifasciata, with swathed prey, 



dorsal view FIG. 4 



20. Banded Argiope, Argiope trifasciata, ventral view 139 



21. Orange Argiope, Argiope aurantia, in web, side view 154 



22. Spiny-bodied spider, Micrathena gracilis, spinning 155 



23. Orb Weavers 



a Shamrock orb weaver, Aranea trtfolium 170 



b The garden spider, Aranea diadema 170 



c Orb weaver, Neoscona 170 



d Orb weaver, Neoscona, on leaf 170 



24. Wolf spider, Geolycosa missouriensis, at mouth of burrow FIG. 5 



25. Wolf Spiders 



a Wolf spider, Geolycosa turricola, side view 182 



b Burrow of wolf spider, Geolycosa, in grass 182 



26. Grass spider, Agelenopsis, on egg sac 183 



27. Crab spider, Misumena calycina, on flower 198 



28. Crab spider, Xysticus gulosus, with prey 199 



29. Jumping spider, Phidippus mineatus, side view 214 



30. Jumping spider, Phidippus cardinalis, on flower 2 1 5 



31. Green lynx spider, Peucetia viridans, and nest 230 



32. Jumping spider, Phidippus, dorsal view 231 



GRAVURE ILLUSTRATIONS 



I. Banded Argiope, Argiope trifasciata, swathing a 



grasshopper 20 



II. Orange Argiope, Argiope aurantia, with swathed 



prey 2 1 



III. Female bolas spider, Mastophora cornigera, with re- 

 cently emerged brood, including some adult 

 males 28 



A symmetrical orb web of a mountain orb weaver, 



Aranea aculeata 28 



Meshed web of Dictyna on dried weed 28 



