Abdomen, xiii
Adaptive characters, xvi
Air-tubes, ix
Alpine Lepidoptera, colours of, xv
Anastomosis, xii
Antennæ of imago, x
" of larva, ix
Apex of wing, xii
Arctic Lepidoptera, colours of, xv
Base of wing, xi
Biliary vessels of imago, xiii
" " of larva, x
Bi-pectinated, x
Butterflies, 101
Cæcum, xiii
Caterpillars, ix
Classification, xvi
Clavate intestine, x
Coincidence of veins, xii
Colon of imago, xiii
" of larva, x
Concurrence of veins, xii
Connection of veins, xii
Contrast colours, xv
Costa, xi
Coxa of imago, xiii
" of larva, ix
Crown, x
Digestive system of imago, xiii
" " of larva, x
Divergence of character, xiv
Dorsum, xi
Ecdysis, x
Egg, ix
Eyes, compound, x
" simple, x
Face, x
Fasciculate-ciliated, xi
Femur of imago, xiii
" of larva, ix
Filiform, xi
Frenulum, xii