Rhopalum pt-dit ellatum, 73 ; 

 strong power of localization, 



73- , 

 rabrocmctum, 74. 



Social wasps, general habits, 3 ; 

 color sense, 5 ; sense of smell, 

 8; affecting plant distribution, 

 . number in one nest, 1 2. 



Solitary wasps, general habits, 15. 



Sphex, habits noted by Fabre, 

 69. 



ichneumonea, 56; nests be- 

 gun and deserted, 56; locality 

 study, 58 ; intelligence, 305. 



Tachysphex tarsata, 261. 

 Tachytes sp. ?, 248. 

 peptonica, 252. 



Trypoxylon, immense numbers of 

 spiders destroyed, 195. 



albopilosum, 190. 



bidentatum, 194. 



rubrocinctum, 180; protec- 

 tion of nest by male, 181 ; male 

 sometimes assists in storing 

 nest, 182; order in which eggs 

 hatch, 180. 



Vespa germanica, 13. 

 maculata, 1 3. 



Wesenberg, on habits of Bern- 



bex rostrata, 139. 

 Wheeler, W. M., on capture of ante 



by Aphilanthops f rigidus, 1 76. 

 WUliston, S. W., on habits of 



Ammophila yarrowii, 40. 



