242 BUTTERFLIES 



wing. Under surface of hind wing commonly marked 

 with spots rather than Hnes. 



Colors brownish red : The Coppers. 



Colors blue: The Blues. 



THE TRIBE OF THE HAIR-STREAKS 



The Hair-streaks are small butterflies with the eyes 

 notched to allow for the insertion of the bases of the 

 antennae. The name is given on account of the fine, 

 hair-like markings which extend across the under surface 

 of the hind wings. In many species there is a tailed pro- 

 jection or two on the hind inner margin of the hind wing. 

 The caterpillars are remarkable for the small head, so 

 connected with the body that it can be pushed forward 

 in a characteristic way. 



The Hair-streaks are among the most exquisite and deli- 

 cate of all our butterflies. A large proportion of them 

 have the upper surface of the wings toned in beautiful 

 hues of grayish brown and the under surface lighter gray, 

 marked with dots and stripes, some of which are brilliant 

 in coloring. A few of the larger species are brilliantly 

 iridescent in purples, blues, and greens, marked with 

 black. The males have well-developed scent-pockets 

 in many species, these being commonly along the front 

 border of the front wing. 



A very interesting suggestion in regard to the possible 

 function of the curious tail projections was made nearly a 

 hundred years ago by some English entomologists and has 

 since been discussed at considerable length in various pub- 

 lications. It is that the slender tails, together with the 



