238 THE SCOLYTID BEETLES. 



Dendroctonus parallelocollis — Continued Page. 



host trees 101 



identified specimens 101 



in synopsis of characters 70 



paired species 211 



Dendroctonus piceaperda — 



adiilt, variations, distinctive characters, revisional notes 126-127 



bibliography and synonymy 130 



distribution 129 



galleries 128-129 



historical 4 



host trees 129 



identified specimens 129-130 



larva 127-128 



paired species 211 



pupa 127 



Dendroctonus piniperda — 



historical 3 



synonym of MyelopMlus piniperda 5 



Dendroctonus ponderosse — 



adult, variations, distinctive characters, revisional notes 109-111 



bibliography and synonymy 114 



distribution 112-113,211 



economic relation to forests 113 



galleries 112 



historical 4 



host trees 113 



identified specimens 113-114 



in synopsis of characters 71 



larva Ill 



paired species 211 



pupa Ill 



pupal cell 204 



Dendroctonus pseudotsugse — 



adult, variations, distinctive characters, revisional notes 121-123 



bibliography and synonymy 126 



distribution 124-125 



galleries 124 



historical 124 



hosts 68,125 



identified specimens 125 



in synopsis of characters 71 



pupa 123-124 



Dendroctonus punctatus — 



adult, variations, distinctive characters, revisional notes 142-143 



bibliography and synonymy 143 



distribution 142-143,211 



historical 3 



host tree 142 



in synopsis of characters 72 



paired species 211 



