Crabro lentus, 101; both flies and bugs found in nests, 101. —— sexmaculatus, 99; takes both flies and gnats, 101. —— stirpicola, 106; contrasted with other wasps as to manner, 106; works night and day to finish nest, 108. —— wesmæli, said to take both flies and bugs, 101. Dunning, S. W., on finding flies alive in nests of Bembex, 135. Fabre, J. H., on automatically perfect instincts of Ammophila, 52; on French species of Sphex, 69; on the habits of Bembex, 134; on Philanthus apivorus, 162; on French species of Pelopæus, 273. Goureau, on mutilation of spiders by wasps, 244. Larra quebecensis, 263. Lubbock, Sir John, on individuality in ants, 288. Lyroda subita, 253; feeds her young from day to day, 255. Marchal, Paul, on poor locality sense of Pompilus seriaceus, 284. Marchand, observation on locality sense of Bembex rostrata, 125. Monedula signata, locality study noted by Bates, 136. Mutilation of spiders by wasps, 243. Odynerus, variation in nesting habits, 95. —— anormis, position of egg in nest, 91. —— capra, 94. —— conformis, position of egg, 91. —— perennis, 89. —— reniformis, position of egg, 90. —— vagus, wariness, 94. Oxybelus quadrinotatus, 75; method of carrying fly, 80. Passolocus annulatus, 87. Pelopæus, 265; individuality, 270; forgetfulness, 271; difference between French and American species, 273. Philanthus apivorus, sucks honey from bee, 162. —— punctatus, 154; habits of colony, 156; experiments on stinging habits, 162; nesting habits of males, 166. —— ventilabris, 166. Plenolocus peckhamii, 95; stalk invaded by bees and other wasps, 96. Polistes carnifex, locality study noted by Belt, 60. Pompilus biguttatus, unreasoning conduct, 298. —— fuscipennis, 216; afraid of ants, 219; biting legs of spider, 220; sense of locality, 221. —— marginatus, 221; capturing spider, 225; method of digging nest, 229. —— quinquenotatus, 197; confined to one species of spider, 202; nest invaded by small ants, 202; hangs spider on plant while nest is being made, 204; robs her neighbors, 211; loses her way, 214. —— scelestus, 230; bites legs of spider, 230; pursued by parasites, 231; sleeping habits, 236. —— seriaceus, poor locality sense noted by Marchal, 284. —— subviolaceus, following scelestus, 236. Priononyx atrata, note on sleeping habits, 118. Rhopalum pedicellatum, 73; strong power of localization, 73. —— rubrocinctum, 74. Social wasps, general habits, 3; color sense, 5; sense of smell, 8; affecting plant distribution, 11; number in one nest, 12. Solitary wasps, general habits, 15. Sphex, habits noted by Fabre, 69. —— ichneumonea, 56; nests begun and deserted, 56; locality study, 58; intelligence, 305. Tachysphex tarsata, 261. Tachytes sp. ?, 248.