INDEX. 245 



Platypus — Page. 



abdominal tergites 181 



food habits 199 



general habits 198 



larvae 197 



legs 179 



social gallery 202 



Polygraphus, types of genera 222 



Populus, host of Trypophloeus 209 



Pseudotsuga, host of Dendroctonus pseudotsugae 68 



Pseudotsuga macrocarpa — 



host of Dendroctonus 79 



host of Dendroctonus pseudotsugse 125 



Pseudotsuga taxifolia — 



host of Dendroctonus 79 



host of Dendroctonus harheri 87 



host of Dendroctonus pseudotsugx 125 



host of Scolytus 209 



Pteleohms — 



food habits 199 



host 209 



Pterostichus, comparison of head with Dendroctonus 11, 12, 21 



Pycnarthruni — 



epistoma 175 



labrum 175 



Quereas — 



host of Dryocoetes 209 



host of Scolytus 209 



Salix, host of TrypopJilaus ^ . 209 



Scolytidse, in key to families 224 



Scolytinse, in key to subfamilies 225 



Scolytoidea — 



antennae 171-174 



article 165-232 



bibliography 229-232 



body 175-183 



eggs 197 



embryo 197 



eyes 174 



general anatomy • 168 



general characters 175-195 



genera of doubtful position 228 



genera provisionally assigned to subfamilies 227 



internal anatomy 183-195 



larva 197 



morphological characters 169-198 



mouthparts 174-175 



physiological characteristics 198-210 



position 167-168 



position of principal described genera 226-227 



pupa 196 



secondary sexual characters 195-196 



taxonomy 216 



