INTRODUCTORY. 



thickened and spreadinj,^ out towards the tip {dilate) ; B, simple, 

 thread-Hke {/ili/onn) structure, without teeth, hairs, or bristles ; 

 C, fringed with fine hairs {ciliate) ; D, fringed with fine hairs, 

 and with longer bristles at the joints {setose ciliate) ; E, the 

 fringe in tufts {fasciculate) ; F, toothed, with fine hairs on the 

 teeth {dentate ciliate) ; G, toothed with hairs in tufts from 

 the teeth {dentate fasciculate) -, H, I, with double rows of hair 



H 



Fig. 2. 

 Antennae of Moths. 



scales {bipectinate) \ in I the projections are continued to the 

 tip, and are themselves fringed with fine hairs, giving the 

 antennir. a very feather-like appearance — the term " plumose " 

 is sometimes used to describe this form of antennii3 ; in H the 

 pectinations do not reach the apical fourth, which is simple. J, 

 the lamellate^ that is, the undersides of the rings or joints are 

 made up of minute plates. 



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 



