ILLUSTRATIONS. XIII 



Page. 



FK ; . 72. Dendroctonus jeffreyi: Distribution map 116 



73. Dendroctonus simplex: Egg galleries and larval mines 119 



74. Dendroctonus simplex: Distribution map 120 



75. Dendroctonus pseudotsugse: Egg^galleries and larval mines 122 



76. Dendroctonus pseudotsugse: Egg gallery and larval mines 123 



77. Dendroctonus pseudotsugse: Section of log with bark removed, showing 



brood galleries marked and' grooved on surface of wood 124 



78. Dendroctonus pseudotsugx: Distribution map 125 



79. Dendroctonus piceaperda: Egg gallery and larval mines 128 



80. Dendroctonus piceaperda: Distribution map 129 



81. Dendroctonus engelmanni: Egg gallery and eggs in living bark 132 



82. Dendroctonus engelmanni: Distribution map 133 



83. Dendroctonus borealis: Distribution map 134 



84. Dendroctonus obesus: Distribution map 137 



85. Dendroctonus rufipennis: Distribution map 140 



86. Dendroctonus murrayanse: Distribution map 141 



87. Dendroctonus punctatus: Distribution map 143 



88. Dendroctonus micans: Egg galleries and larval chamber 145 



89. Dendroctonus micans: Distribution map 146 



90. Dendroctonus terebrans: Distribution map 150 



91. Dendroctonus valens: Egg galleries and larval chamber 152 



92. Dendroctonus valens: Work in bark at base of stump 153 



93. Dendroctonus valens: Basal wound in living tree resulting from primary 



injury by this species 154 



94. Dendroctonus valens: Distribution map 155 



95. Dendroctonus adjunctus: Distribution map 158 



