LIST OF ILLUSTRATIONS. XI 



Page. 



Head of Syviphoromyia cruenta. 1, male; 2, female 123 



Outline of front of head Symphoromyia inquisitor, female, to show width of 

 front 128 



Outer side of right antenna of S. kincaidi 130 



Outer side of S. pachyceras: left antenna of male; and right antenna of female.. 134 



Outer side of left antenna of S. pilosa, male 136 



Head of S. plagens, male and female 137 



Outer side of right middle coxa of S. securifera 141 



Archilestes californica, male. 1. Dorsal view. 2. Lateral view 261 



Archilestes californica, female. 3. Dorsal view. 4. Lateral view 262 



Archilestes californica. 5-7 male appendages. 8. Male segment, ventral view. 

 9. Male segment showing chitinous framework. 10-11. Penis. 12. Female 

 prothorax. 13. Female mesostigmal lamina. 14. Female abdominal seg- 

 ments. 15. Archilestes grandis, dorsal view of male appendages 263 



Archilestes californica. 16. Ovipositing. 17. In copulation. 18. Scars from 

 ovi position, one year old. 19. Scars two years old. 20. Bark cut away 



showing eggs in cambium. 21. Egg 264 



Archilestes californica, nymph. 22. Lateral view. 23. Dorsal view. 24. La- 

 bium. 25. Abdominal segment. 26. Color of a live Palo Alto, California, 



specimen 265 



Argia emma, male. 27. Dorsal view. 28. Lateral view 272 



Argia emma, female. 29. Dorsal view. 30. Lateral view 273 



Argia vivida, male. 31. Dorsal view. 32. Lateral view 274 



Argia vivida, ievaaXe. 33. Dorsal view. 34. Lateral view 275 



Argia emma, nymph. 35. Lateral view. 36. Dorsal view 277 



Argia vivida, nymph. 37. Lateral view. 38. Dorsal view 278 



Argia emma, abdominal segments. 39. Lateral view. 40. Dorsal view. 41. 

 Ventral view. Argia funebris, male abdominal segment, lateral view. 42. 

 Argia funebris, male abdominal segment. 43. Lateral view. 44. Dorsal 

 view. Argia vivida, male abdominal segments. 45. Lateral view. 46. ■ 

 Dorsal view. 47. Ventral view. 48. Argia emma, female, mesostigmal 



laminae. 49. Argia vivida, female, mosostigmal laminae 279 



Argia emma, male abdominal segments. 50. Lateral view. 51. Ventral view. 

 Argia vivida, male abdominal segments. 52. Lateral view. 53. Ventral 



view. 54. Argia emma, ovipositing 281 



Argia emma. 55-57. Male, marking on head and thorax. 58-59. Male, mark- 

 ing on abdomen in tenerals, lateral view. 60-61. Female, marking on 

 abdomen in tenerals, dorsal view. 62-64. Argia vivida. Male, marking on 



head and thorax 282 



Argia emma, nymphal detail. 65. Labium, ventral view. 65a. Labium, 

 dorsal view. 66-67. Vulva. 68-69. Abdominal segment of male. 70. 

 Antenna. 71-76. Argia vivida, nymphal detail. 71. Labium, ventral 

 view. 71o. Labium, dorsal view. 72-73. Vulva. 74-75. Abdominal seg- 

 ment of male. 76. Antenna 284 



Ischnura cervula, male. 77. Dorsal view. 78. Lateral view 297 



Ischnura cervula, tevaale. 79. Dorsal view. 80. Lateral view 298 



Ischnura perparva, male. 81. Dorsal view. 82. Lateral view 299 



/sc/mwra perpari;a, teneral female. 83. Dorsal view. 84. Lateral view 300 



Ischnura perparva, aged female. 85. Dorsal view. 86. Lateral view 301 



Ischnura cervula. 87. In copulation. 88. Ovipositing. 89. Male clasping 

 organs attached to female prothorax. 90. Copulation, detail. 91. Male, 

 segment, parts in copulatory position. Ischnura perparva. 92. In copula- 

 tion. 93. Ovipositing 302 



