A general treatise on plankton. WATSON, J. R. 1911. A Contribution to the Study of the Ecological Distribution of the Animal Life of North Central New Mexico with Especial Attention to the Insects. First Ann. Rep. New Mexico Nat. Resource and Conserv. Comm., pp. 67-117. Description, lists, and observations on the animal and plant associations of the arid region. WHEELER, W. M. 1905. An Annotated List of the Ants of New Jersey. Bull. Amer. Mus. Nat. Hist., Vol. XXI, pp. 371-403. Ants grouped in the following associations: woodland, glade, field, meadow, heath, and sand. 1908. Comparative Ethology of the European and North American Ants. Jour. für Psychol. und Neurol., Bd. XIII, pp. 404-435. (Festschrift Forel.) WICKHAM, H. F. 1903. The Beetles of an Oregon Beach. Ottawa Naturalist, Vol. XVII, pp. 49-52. INDEX Abbreviations, 69 Acalyptrate Muscidæ, larval food-habits, 78 Accidents, 62 Acridiidæ, courtship, 117 habitats, 148 Adaptation, adjustive, 10 and evolution, 97 as a process, 9 as a product, 9 theory, 136 Adirondacks, aquatic insects, 75 Adjustment of organisms, process of, 122 Adjustment, process of, 5, 30, 31, 33, 122 Age of lower organisms, 97 Aggregate, 8 as agent or entity, 4 ecology, 4, 23, 24, 133 Aggregations, 27, 145 dynamic relations of, 130 Agricultural reports of the U. S. patent office, index, 72 Air, vegetational control of relative evaporating power of, 90 vegetational control of relative humidity, 90 Alluvial flats, vegetational invasion, 89 Alps, soil fauna, 144 Alternating generations of oak gall flies, 143 Ambrosia beetles, 127 American lobster, natural history, 113 _Amia calva_, natural history, 117 Amphibians, associations of desert species, 148 collecting, 58 desert species, 148 food of desert species, 148 reactions to light, 116 Amphioxus, behavior, 116 sensory reactions, 116 Amphipods, distribution of fresh-water, 111 food of fresh-water, 111 reproductive capacity of fresh-water, 111 salt-marsh, habits and life history, 119 _Amphithoe longimana_ Smith, habits and natural history, 113 Animal and plant associations of arid region, 148, 149 Animal associations, and marine vegetation, 89 and vegetation, 90 of a lake shore, 134 Animal behavior, 107, 121 as a process, 102 Bohn’s studies in, 107 limits of study, 103 Animal communities, 133, 134 Animal ecology, of Chicago region, 134 of Cold Spring sand spit, 136 of seashore, 63, 64 of shore, 139 Animal galls, 143 Animal geography, physiological, 101 Animal intelligence, development, 115 evolution, 114 nature, 115 raccoon, 111