Wingless: caddis-fly, [481];

earwigs, [205];

Insects, [345], [352], [356], [451], [488], [536], [547];

wingless Psocidae, [394] f.

—see also Apterous

Wings, [107];

origin and function, [394];

of Blattidae, [225] f., [227];

development of, in locust, [288];

in Trichoptera, [479], [480];