LEPIDOPTERA. 259 



are RHOPALOCERA ('PoTraAov, Rhopalon, club ; 

 keras, horn), containing the Butterflies; HETEROCERA 

 CErcpoc, heteros, different ; Kepag, keras, horn), contain- 

 ing the Moths. 



The section RHOPALOCERA, the club-horns, contains 

 the Butterflies. The antennae of these are largest at the 

 tip. In most they are very fine and hair-like, with an 

 abrupt enlargement or knob at the tip. In others, as 

 the Blue Butterflies, the enlargement is rather more 

 gradual and club-like.* 



In the HETEROCERA (the Moths), the horns are some- 

 times thickened about the middle or towards the tip, 

 sometimes are like slender hairs, sometimes are branched 

 and appear like exquisite feathers, but are always more 

 or less tapering, being smaller at the tip than imme- 

 diately below it. 



Another difference between the Butterflies and Moths 

 is, that in Butterflies the wings are never folded nor laid 

 one over the other. In repose they are generally raised 

 above the body and placed against each other, displaying 

 only the under surfaces. 



Of the Moths, on the contrary, while some repose 

 with the wings expanded, the greater part fold the hind- 

 wings and lay the fore-wings down over both them and 

 the body. The Butterfly-like Currant Moth, and some 

 of its relations, rest with the wings raised Butterfly- 

 fashion ; but these having tapering and sometimes 

 feathered antenna, may by this be known as Moths. 

 Some Butterflies of the family Hesperida3 (a family 

 which seems to be in many respects a link between the 



* There are exceptions to this rule among foreign Butterflies, some 

 having tapering, hair-like, or somewhat flat-knobbed antennae. 



S * 



