Fig. 2.
Antennæ of Moths.
Fig 3.
Connecting Bristle and Catch.
The wings of a moth are practically identical with those of a butterfly (see diagram "Butterflies of the British Isles," p. 12). Normally the fore wings have twelve ribs or veins, and the hind
wings eight, but in some genera a rib, or perhaps two, may be absent from the fore or the hind wings; or an extra rib, sometimes two, may be found on the hind wings. These modifications, and others, of the general plan of neuration have been employed as a basis upon which to found genera, or to group them together in classification.
Fig. 4.