156 Bugs, Butterflies, and Beetles 



spiral tongue (wound like a watch spring) . When 

 at rest, the butterfly holds its wings upright, erect, 

 never folds them as do a great many moths. No 

 bristle and socket can be found on the butterflies' 

 wings to hook them together during flight, like a 

 woman's dress, as the wings of some moths are held 

 together. Most of the smellers, feelers or antennae 

 of the butterflies are knobbed on the end, although 

 some approach very closely to the thread-like form 

 which naturalists call " filiform." 



THE SWALLOW-TAILED BUTTERFLIES 



The most attractive butterflies are the swallow- 

 tails ; the so-called swallow-tails to the wings of the 

 butterfly are marks of distinction, as they are on the 

 wings of the Luna moth. There are over three hun- 

 dred kinds of swallow-tail butterflies known; the 

 three hundred does not refer to the number of but- 

 terflies, because one may see that many in a day. 

 Butterflies sometimes migrate in great flocks and I 

 have seen them in clouds, floating over the house- 

 tops of New York City. On such occasions one is 

 liable to see many, many times three hundred in 

 one day. 



Among the butterflies, so far as I know, there 



