Trigona mediorufa, 124, 125. 
Trigona mellea, 124. 
Trigona mellicolor, 124. 
Trigona mirandula, 122. 
Trigona molesta, 126. 
Trigona musarum, 123. 
Trigona nitidula, 126. 
Trigona opaca, 126. 
Trigona pachysoma, 125. 
Trigona pallida, 124. 
Trigona perangulata, 125. 
Trigona postica, 125. 
Trigona remota, 126. 
Trigona salvataris, 124, 125. 
Trigona tataira, 124. 
Trigona tataira friesiella, 124. 
Trigona zonata, 123. 
Social parasitism of Lasius, 167. 
Sodium flouride as insecticide, 187. 
Solenopsis debilis, 26. 
Solenopsis fugax, 26. 
Index 205 
Solenopsis molesta, 27. 
Spathimeigenia nigriventris, 139. 
Stephanitis, 16. 
Tachinide, new species of, 137. 
Tapinoma erraticum, 173. 
Thermotropism in Chionea, 149. 
Thimbleberry, Aphids on, 85. 
Tingidee, North America, 13. 
Trichodectes scalaris, control, 187. 
Trichomyia, fossil in amber, 40. 
Trigonalys, fossil in amber, 40. 
Trydymus zneicornis, 98. 
Trydymus gargantua, 98. 
Trydymus poloni, 98. 
Trydymus robiniecola, 98. 
W heeleriella santschii, 173. 
Winnertziola burmitica, 42. 
Zelus audaz, 15. 
Zelus socius, 15. 
Zygobothria nidicola, 63. 
