Ancylus, length of life of, [56].
Andricus, length of life of summer generation, [50].
Anisotropism, [400].
Anlagen, [192].
Anodonta, length of life of, [56], [57].
Ants, duration of life of male and female, [18], [48], [50], [51], [52], [59], [156].
Aphilotrix, length of life of imago of, [50].
Aphis, length of life of, [41];
parthenogenesis of, [228], [289];
polar bodies of, [349].