INTRODUCTORY. 3 



thickened and spreading out toward sthe tip (dilate) ; B, simple, 

 thread-like {filiform) structure, without teeth, hairs, or bristles ; 

 C, fringed with fine hairs {cilialc) ; 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 

 antenna^ a very feather-like appearance—the term " plumose " 

 is sometimes used to describe this form of antenna:^ ; 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 hmd 



