PLATE 4 



Fig. 66. Callipterus caryae Monell, sixth antennal segment and spur. 



Fig. 67. Monellia caryella (Fitch), sixth antennal segment and spur. 



Fig. 68. Monellia caryella (Fitch), third antennal segment. 



Fig. 69. Arctaphis populifolii (Essig), cauda. 



Fig. 70. Micrella monella Essig, cauda. 



Fig. 71. Arctaphis populifolii (Essig), third antennal segment. 



Fig. 72. Micrella monella Essig, third antennal segment. 



Fig. 73. Symydobius macrostachyae Essig, third antennal segment. 



Fig. 74. Symydobius salicicorticis Essig, third antennal segment. 



Fig. 75. Fullawaya saliciradicis Essig, third antennal segment. 



Fig. 76. Thomasia, crucis Essig, third antennal segment. 



Fig. 77. Thomasia populicola (Thomas), third antennal segment. 



Fig. 78. Thomasia salicicola (Essig), third antennal segment. 



Fig. 79. Lachnus ferrisi Swain, tarsal claw. 



Fig. 80. Pterocomma populifoliae (Fitch), tarsal claw. 



Fig. 81. Pterocomma flocculosa (Weed), cornicle. 



Fig. 82. Pterocomma populifoliae (Fitch), cornicle. 



Fig. 83. Essigella calif ornica (Essig), antenna. 



Fig. 84. Longistigma sp., front wing. 



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