pair of legs, are not fully developed, being aborted (see Plate A, Fig. d) and therefore 

 do not serve for walking; and that in the families of the Eryrinidce, or "Metal- 

 marks," and the Lycoenidce, or "Blues and Coppers," the females have six legs 

 adapted to walking, while the males possess only four ambulatory legs, the front 

 pair being in the latter sex aborted in these families, as in the Nymphalidce. The 

 legs of butterflies, like those of all other insects, consist of five parts (see Plate A, 

 Fig. /) the first of which, nearest the body, is called the coxa, with which articulates a 

 small ring-like piece, known as the trochanter. To the trochanter is attached the 

 femur, and united with the latter, forming an angle with it, is the tibia. The last 

 division of the leg is the tarsus, or foot, composed of a series of joints, to the last of 

 which is attached a pair of claws, which in butterflies are generally rather minute, 

 though in other orders of insects these claws are sometimes long and powerful, this 

 being especially true of some beetles. The prothoracic legs of the Nymphalidce and 

 of the males of the Erycinidce and Lyccenidce have lost the use of the tarsus, only 

 retaining it in feeble form, and the tibia has undergone modification. In many of 

 the Nymphalidce the tibia is densely clothed with long hairs, giving this part of the 

 leg the appearance of a brush, whence the name "Brush-footed Butterflies" (see 

 Plate A, Fig. d) . The tibiae are often armed with more or less strongly developed 

 spines. 



The most striking parts of butterflies are their wings, which in proportion to 



16 



