ART. 10 THE FAMILY SIMULIIDAE— DYAK AND SHANNON 49 



27. Eusimuliuin ohtusuin Dyar and Shannon, male clasper. 



28. The same, male adminiculum. 



29. The same, male adminiculum arms. 



30. Prosiinidluiii cxiffcns Dyar and Shannon, male clasper. 



31. The same, male adminiculum. 



32. Prosiinulium panccrastes Dyar and Shannon, male clasper. 



33. The same, male adminiculum. 



Plate 4 



Fig. 34. EusiinuUum mutaium (Mallooh), female ovipositor. 



35. The same, .i^enital rod. 



36. EusiinuUum permutatuui Dyar and Shainion, female genital rod. 



37. Eusimulium pecuarum (Riley), female genital rod. 



38. Eusimulium clarum Dyar and Shannon, female genital rod. 



39. Eusimulium minus Dyar and Shannon, female genital rod. 



40. Eusimulium canonicolum Dyar and Shannon, female genital rod. 



41. Eusimulium ochraceuiii (Walker), female genital rod. 



42. Eusimulium, joliannseni (Hart), female genital rod. 



43. Eusimulium horeale (Malloch), female genital rod. 



44. Eusimulium aureum (Fries), female genital rod. 



45. Eusimulium congareenarum Dyar and Shannon, female genital rod. 



46. EusimtUium mexicanum (Bellardi), female genital rod. 



47. Eusimulium alticolum Dyar and Shannon, female genital rod. 



48. Eusimulium dacotense Dyar and Shannon, female genital rod. 



49. The same, male clasi)er. 



50. The same, male adminiculum. 



51. The same, male adminiculum arms. 



52. Eusimulium clarum Dyar and Shannon, male clasper. 



53. The same, male adminiculum and arms. 



54. Eusimulium johannseni (Hart), male clasper. 



55. The same, male adminiculum (above) and arms (below). 



Plate 5 



Pio. 56. ^imulium katmai Dyar and Shannon, female ninth segment and cerci. 

 57. The same, genital rod. 

 .58. Simulium slossomic Dyar and Shannon, female ninth segment and cerci. 



59. The same, genital rod. 



60. Simulimn pictipes Hagen, female ninth segment and cerci. 



61. The same, genital rod. 



62. Simulium meridionale Rile.v. female ninth segment and cerci. 



63. The same, genital rod. 



63fl. Simulium occidoitale Townsend, female ovipositor. 



64. The same, genital rod. 



65. Simulium paniassum Malloch. female ninth segment and cerci. 



66. The same, genital rod. 



67. Simulium sayi Dyar and Shannon, female ninth segment and ceVei. 



68. The same, genital rod. 



69. Simulium decorum Walker, female ninth segment and cerci. 



70. The same, genital rod. 



71. Simulimn hunteri Malloch, female ninth segment and cerci. 



72. The same, genital rod. 



72o. Simulium metallicum Bellardi. female ninth segment and cevci. 



