DowdesweU, 132 

 Dragonfly, 62 



Drift, genetic, 97-100, 102, 146 

 Drosophila, 32, 41, 46, 47, 49, 50, 52, 58, 

 59, 139-145, 148, 151, 152, 156, 158, 

 175, 177, 186,238,248 



chromosome inversion types in, 140-145 



cross-veinless phenotype in, 156 



melanogaster, 64, 145, 151, 156, 175 



miranda, 180 



paulistorum, 219, 238, 299 



persimilis, 144, 242 



pseudoobscura, 140, 143-145, 242 



tropicalis, 113, 144 



virilis, 180 

 Dubois, 259 

 Ducks, 241 



Dunker religious community, 146 

 Dunn, L. C, 16, 55 

 du Noiiy, Lecompte, 295, 314 

 Duplications, 49 

 Dusky flycatcher, 240 



Earthworms, 204 



Ecological distribution, 76, 79, 84 



Ecological dominance, 276 



Ecological succession, 86 



Ecosystems, 84, 86, 165, 276 



Ecot>pic variation, 213 



Effective population size, 232, 235 



Efl^ector substances, 65 



Egg mimics, 229, 233, 245, 246 



EhrUch, P. R., 77, 88, 137, 140, 159, 306, 



308, 314 

 Elapidae, 265 

 Elephants, 254 

 Elephas maximus, 254 

 Elodea, 196 



Emberiza citrinella, 128 

 Embryology, experimental, 63 

 Emigrantes, 205 

 Emigration, 102 

 Empidonax, 240 



oberholseri, 240 



wrightii, 240 

 Endoplasmic reticulum, 25, 27 

 Endopolyploidy, 31, 64, 200 

 Energy, 5, 9-12 

 English sparrows, 84, 125 

 Ensatina, 217, 219, 221, 238 

 Environment and recombination, 170, 171, 

 183, 206 



Environmental factors, classification of, 83 



Enzymes, 9, 46 



Epigenetic system, 60 



Epigenotvpe, 60, 67, 75, 83 



Epiphytes, 84 



Epistasis, 42 



Epling, 235, 236 



Equational division, 28 



Equilibrium in communities, 86 



Erebia calcarius, 224, 245 



cassioides, 220, 223, 224, 244 



iranica, 245 



nivalis, 220, 223, 224, 244 



tyndarm, 220, 223, 244 

 Erickson, 76, 78 

 Erithacus rtibecula, 128 

 Erodium, 85 

 Escherichia coli, 163 

 Ethics, 292 

 Euchromatin, 50, 184 

 Eugenics, 108 

 Euphorbiaceae, 271 

 Euphydnjas, 303-306 



chalcedona, 303-306 



editha, 75-77, 79, 82, 303-306 

 Eupolyploidy, 184, 189-196 

 Europe, Western, culture of, 291, 296-298 

 Evening primrose, 177 

 Evolution, as an aspect of human culture, 

 295 



behefin,310 



of brain in man, 286, 287 



cultural, 285-292, 295 



and biological, comparison of, 287, 

 288-292 

 interaction between, 289-292 

 {See also Cultural evolution) 



of eyes, 157 



modes of, 259, 260, 264-266, 270 



phyletic, 260, 261 



quantum, 260, 263 



rates of, 260-264, 266, 267 



of social behavior in bees, 158, 159 



teaching of, 309, 310 



trends in, 274-276 

 Evolutionary momentum, 275 

 Evolutionary success, standards of, 295, 296 

 Evolutionary theory, and cultural bias, 296- 

 298 



and language, 296 

 Exchange, four-strand, 41, 43 



two-strand, 41, 43 



337 



