254 A NCESTR Y A ND CLA SSI PICA TION. 



and in all the other members of that family 

 this also is true. But the moment we leave these 

 two lower families a change ap- 

 pears in the front legs and pro- 

 gresses regularly ; in the gossa- 

 mer-winged butterflies all the 

 legs of the female are alike, but 

 c the front legs of the male are 



FIG. 175. Side view of 

 l^gs and appendages of 

 Calephelis borealis, X 5 ; 

 a, tibia and tarsus of fore 

 leg of male, with tarsus 

 on right still further en- 

 larged , b, tibia and tarsus 

 of fore leg of female, 

 with last joint of tarsus SeCtS 

 on right still further en- 

 larged; ;c, tibia and tarsus an autlgeny 

 of middle leg of male. 



of a remark- 

 able character. In the lower 



cmh-faTYiilv to \vhirTi nnr Klnp<3 FIG. 176. Side view of 



ictmiiy, to w ii. les ]egg and a pp endage8 of Eu _ 



anrl prvrmprcs P h y drvas Phaeton, x 5 ; , 



Coppers tibia and tarsus of f9re leg 



T -, r-rr of male, with last joints of 



belong [I 1 Ig. tarsus on right still further 



. enlarged ; 6, tibia and tar- 



174], the tarSl BUS of fore leg of female, 

 with last joints of tarsus on 



of this sex gftfiatsrM 



b w ^ have lost the dle leg of male - 



c terminal claw, and are densely 



FIG. 177. Side view of 



spined beneath ; even within 

 this sub-family we can trace 

 gradations, the claw being first 



of female, with tarsus on -. -, , n 



right stiii further eniarg- replaced by a single curving 



eiT; c, tibia and tarsus of 



middle leg of male. spine, and then by a pair of 

 straight spines only a little longer than the 

 others ; in the higher sub-family, the erycmids 



