184 MISCELLANEOUS FOREST INSECTS. 



Smodicum — Page. 



in table of families and genera of cerambycoid larvse 153 



larvae studied by Webb 151 



Sorhus aucuparia, food plant of Megastigmus brevicaudis 159 



Sorhus latifolia, host of Syntomaspis druparnm 158 



Sorbus scandicu — 



host of Megastigmus brevicaudis 159 



host of Syntomaspis druparum 158 



Spondylis, in table of larvte by Perris • 149 



Statistical taxonomy of Pissodes 28-30 



Strongylngaster uncus, Hoplocampa (?) atriceps a synonym 147 



Sycamore, seasoned , infestation by Lyctus pJanicoUis 131 



Synaphccta — 



in table of families and genera of cerambycoid larv;e 152 



larvte studied by Webb 151 



Syntomaspis druparum — 



bibliographic reference 159 



destruction of apple seeds 158 



distinguished from Megastigmus brevicaudis 159 



life history in brief 158 



Syntomaspis pubescens, bibliographic reference 163 



Syzygonia — 



synonymy 101-102 



in table of allied genera 102 



Syzygonidea, in table of genera allied to Syzygonia 102 



Tanbark oak, infestation by Lyctus cavicollis 131 



Tenthredinoidea — 



alphabetical list of genera described by William H. Ashmead, with 



determined synonymy 103-104 



article 69-109 



bibliography of more important writings of William H. Ashmead 104 



catalogue of genotypes 72-92 



genotype index 92-97 



genotypes 69-109 



synonyms of certain genera 98-102 



work of William H. Ashmead 102-109 



Tenthredo (Allantus) obtusa, bibliographical reference, not a Hoplocampa 147 



Tetropium — 



in table of families and genera of cerambycoid larvse 155 



in table of larvae by Perris 149 



larvae studied by Webb 151 



Tortrix strobilotina, erroneously considered host of Megastigmus strobilobius 159 



Torymidte {see also Collimanidae ) — 



bibliographic reference 162 



Tragosoma — 



in table of families and genera of cerambycoid larvae 155 



larvae studied by Webb 151 



Tsuga mertensiana hookeriana, host of Megastigmus strobilobius 160 



Tsuga sp. , food plant of Megastigmus pinus 160 



Tylonotus — ■ 



in table of families and genera of cerambycoid larvae 153 



larvae studied by Webb 151 



