Antennæ, 26, 28. apparatus for cleaning, 42. form and structure in Eucera, 29. possible complex function of, 57. Antennæ, sexual differences in length, 233. their probable use, 55, 57. used as means of communication, 58. Anthidium, general observations on, 281. geography of, 75. native species, 279. natural history of, 282. scientific description of, 279. Anthocopa, general observations on, 292. geography of, 76. native species of, 292. natural history of, 293. scientific description of, 290. Anthophora, general observations on, 238. geography of, 70. infested by Melecta, 240. list of native species, 238. natural history of, 238. scientific description of, 236. trophi of, 29. Apathus, general observations on, 304. geography of, 77. list of native species, 304. scientific description of, 302. the Bombi they infest, 306. Apidæ, diagram of the mode of folding the tongue in repose, 39. = normal bees, 160, 227. Apis, general observations on, 321. geography of, 79. native species, 321. natural history of, 322. origin of names, 321. scientific description of, 318. see “Bee” and “Bees.” Appearance of bees intermittent, 54. Appendiculated, when there is a small appendage, as in the lip of Halictus, and at the end of the marginal cell of the wings, etc. Arrangement and description of British bees, 184. Artesian well, peculiar results from its soil, 223. Articulate, where jointed, or the point of attachment. Artisan bees = Dasygasters, 272. Aryans, one of the primitive divisions of the human race, 4. Atmosphere, its conditions affect bees, 50. Aulacus, 287. Auriculated, with a small ear-like appendage. Bee, constructive habits of the, early noticed, 93. general history of the, 17. parasites, 115. parasitism limited, 264. probably earlier known to man than the silkworm, 6. Queen, description of, 322. see “Apis.” several species of, 87. symbol of royalty with the Egyptians, 5. The, one of the Suras of the Koran, 90. why attractive, 1. Bee-bread, 347.