_Why all Polygoneutic Species are not Seasonally Dimorphic_, p. 63.
Homochronic heredity, 63. Caterpillars, pupæ and eggs of summer and
winter generations of seasonally dimorphic butterflies alike, 64. The
law of cyclical heredity, 65. Climatic variation of _Pararga Ægeria_,
68. Continuous as distinguished from alternating heredity, 68. Return
from dimorphism to monomorphism, 70. Seasonally dimorphic species
hibernate as pupæ, 71. Retrogressive disturbance of winter generations,
72. The case of _Plebeius Amyntas_, 75.