INDEX. 



331 



D. 



Daisy, 305 



Dandelion, 305 



Darts of sting, 185 



Delphinium, 282 



Development of drone organs, 200 



of larva, 19, 239 



of sting, 196 



of wings, 134 

 Diaphragm of abdomen, 39 

 Digestion similar in all cases, 58 

 Digestive system, 57 

 Dimorphic flowers, 297 

 Dioecious plants, 260 

 Discovery of the source of wax, 152 

 Dissection, methods of, 74 



of eye, 1 1 2 

 Dorsal vessel, 37 

 Drone, antenna of, 109 



bee, 27 



cells, girdering of, 180 



cells, sealing of, 176 



decapitated, living, 49 



egg, 238 



flight, why sonorous, 149 



organs of, 198 



organs of, how to evert, 204 



organs of, immense, 199 



sealing, theory regarding, 181 



spermatic vesicles of, 200 



without wax glands, 154 

 Drones, abnormal, 207 



albino, 1 1 7 



destroyed in autumn, 211 



eyeless, 1 1 7 



have no father, 223 



not used as heat-producers, 209 



why fleet, 206 



why many produced, 210 

 Ductus ejaculatorius, 202 

 Dufour theory, 68 



Egg apparatus in plants, 256 



artificial impregnation of, 233 

 chorion of, 230 

 laying, 25, 237 

 micropyle of, 23 1 

 spermatozoa within, 233 



Eo-gs in ovarian tubes, 215 



Eggs, number of, laid by each queen, 

 26, 228 



total weight from, of one 

 queen, 83 

 Embedding for dissection, 120 

 Embryo sac, 254 

 Endo-skeleton, 88 

 Epilobium angustifolium, 287 

 Epipharynx, 90 

 Ericaceae, 289 

 Erica Tetralix, 292 

 Evolution of sexes, periods of, 244 

 Experiment illustrating flight, 140 



of Huber on origin of wax, 158 



on cell formation, 170 

 Extra-floral nectaries, 264 

 Extravasation of wings in chrysalis, 



r 34 

 Exuvium left in cell, 24, 243 

 Eye cleaning brush, 128 

 compound, 1 1 1 

 method of examining, 1 1 2 

 retains traces of its cell origin, 

 119 

 Eyeless drone, 117 

 Eyes, in 



of the sexes numbered and 



compared, 118 

 simple, 116 



Fasces, why voided on the wing, 



148 

 Feeding brood in cells, 101 



groove, 86 

 Feelers of sting, 191 

 Feeling hairs, 31, 109 

 Fertile worker food, 82 



workers, 223 

 Fertilisation impossible in confine- 

 ment, 206 



of flowers, 255 



Swammerdam's theory regard- 

 ing, 236 

 Fertilising pouch, 229, 234 

 Festoons of wax workers, 160 

 Flapping moves the bee onward, 



139 

 Flight, ascending and descending, 



143 

 experiment upon, 140 



