INDEX
| PAGE | |
| Ants, modification of forms of | 222–223 |
| sexual trimorphism of | 216 |
| social organization of | 218–219 |
| social parasitism of | 220–221 |
| subfamilies of | 216–217 |
| structure and behaviour of, modification of, by evolution | 222 |
| Ape-fissure, reference to | 322 |
| Ape-man of Trinil, features of | 134, 266 |
| Apes, dentition of | 44 |
| figures showing | 297, 300, 302, 304 |
| genealogical relations of, to man | 21–22 |
| human side of | 293–310 |
| skulls of, features of | 133 |
| Apteryx, flightless bird of New Zealand, reference to | 99 |
| vestigial wings of | 38 |
| Arachnida, general features of | 51 |
| Archaeopteryx, form and features of | 251–253 |
| reference to | 18, 368 |
| restoration of | 251 |
| Archaeornis, reference to | 263 |
| Archaeozoic era, length of | 161 |
| Argentina, fossils of | 87 |
| Aristotle, reference to | 140 |
| Arthropoda, general features and subdivisions of | 50–51 |
| Asia, former connection of, with North America | 86, 91–92, 227–229, 230 |
| Asiatic islands, geology and zoology of | 93–94 |
| Atomic evolution, phases of | 358–361 |
| Australia, ant from, figure showing | 217 |
| zoological isolation of | 85–86 |
| Backboned animals, early forms of | 127–128 |
| Bacon, Francis, cited | 113 |
| Barrell, Joseph, cited | 288 |
| Basement complex of American rocks, reference to | 271 |
| Bates, Henry Walter, cited | 174, 180 |
| Batesian mimicry, reference to | 181 |
| Bather, Francis Arthur, chapter by | 102–111 |
| Bee, bumble, features and habits of | 200–205, 208 |
| carpenter, form, nests, and habits of | 198–199 |
| honey, features and habits of | 187–194 |
| in flight, figure showing | 192 |
| larva of, figure showing | 192 |
| lessons and laws derived from a study of | 193 |
| larva of | 191 |
| queen, life and labor of | 189–191 |
| worker, life and labor of | 191–193 |
| leaf-cutting, features and habits of | 196–197 |
| mason, form and habits of | 197–198 |
| mosquito, form and habits of | 199–200 |
| solitary, features, nests, and habits of | 195–196 |
| stingless, form and habits of | 199 |
| swarm of, figure showing | 188 |
[ 374 ]
