_Rana temporaria_ of Upper Engadine, 618.
Ratzeburg, larva of _Anc. Pinastri_, 265.
Reproduction and growth, 664.
Reversion, of species, 611;
two modes of, 612;
periodic, 613.
_Rhopalocera_, characters of, 433, 471.
_Rhytina Stelleri_, extinction of, 651.
Riley, C. V., descriptions of caterpillars referred to, 437, 521, 522;
on sexual dimorphism in caterpillar, 535.
Ring-spots, 325;
development, 327;
signs of distastefulness, 341;
resembling berries, 344.
Rösel, breeding of _Aras. Levana_ by, 6;
on larva of _Deil. Euphorbiæ_, 206;
of _D. Galii_, 213;
of _Smer. Tiliæ_, 236;
of _S. ocellatus_, 240;
of _Anc. Pinastri_, 265, 268.
Roux, Dr. W., struggle of parts in the organism, 689.
Rutherford, D. G., colour variations of _Ater. meleagris_, 8.