240 INDEX. 



number of aphides found in nest of, 103; date of disappearance of, 104; 

 males of, 101; parasites of, 101; sucking juices from aphides, 105; con- 

 dition of aphides in nest of, 105; duration of egg and larval stages, 106. 



CORNIGER, preying on aphides, 107, 



GRACILIS, preying on aphides, 107. 



Dunning, S. W., on finding flies alive in nest of Bemhex, 66; notes of, on 



Pelopaeus cementarius, 188. 

 EiMER, on stinging habits in wasps, 220-222. 



EvERSMANN, on finding spiders alive in nests of Pelopaeus distillarius, 

 187. 



Fabre, J. H,, on stinging habits of Ammo2)hila hirsuta under artificial 

 conditions, 12; on habit of closing nest as soon as made, in A. argen- 

 tata and A. sabulosa, 20; on unsusal habit of catching prey first 

 and then digging nest, in A. hirsuta, 20; on automatically perfect in- 

 stincts of Ammophlla, 30, 31; on French species of Sphex, 38-40; on 

 relation between Bemhex and parasites, 65; on method of parasite 

 in depositing egg on prey of Bemhex, 65; on number of flies consumed 

 by larva of Bemhex, 66; on Oxyhelus carrying fly impaled on sting, 

 73; on habits of Philanthus apivorus, 105; on habits of Pomp>ilus, 

 125; on comparative value of his observations on solitary wasps, 181; 

 on method of capture of prey by Pelo2^aeus, 190; on spiders of PeJo- 

 ptaeus being nearly always killed, 191; on his belief that Darwin would 

 have admitted that the habits of the solitary wasps could not be ex- 

 plained by the theory of natural selection, 220; on importance of para- 

 lyzing instead of killing prey, 221; on importance of internal anatomy 

 rather than of external structure in determining method used by wasp 

 in stinging prey, 221. 



GossE, P. H., on intelligence of Pelopaeus flavipes, 197, 198. 



GouREAU, on mutilation of spiders by wasps, 161. 



Habit of several species of feeding young from day to day, 71, 72. 



Halictus disparalis, preyed upon by Philanthus 2iunGtatus, 119, 120. 



Harpactopus abdomxnalis, date of appearance of, 174; prey of, 175; 

 method of carrying locust of, 175; position of egg of, on locust, 175; 

 condition of locust stung by, 175. 



Hudson, W. H., on habits of Moneclula p>unctata, 69. 



Instinct, defined, 231. 



Instincts of solitary wasps, classification of, 231. 



Intelligence of solitary wasps, 231, 234-236. 



Locality sense in wasps, 211-219; Darwin's theory of dead-reckoning in 

 relation to, 211; Lubbock and Romanes quoted against this explana- 

 tion of, 211; confused by changes in surroundings, 215, 216. 



Lubbock, Sir John, on individuality in ants, 217. 



