Chap. XIII. 
LAW OF BATTLE, 
47 
wing-spurs serve as sexual weapons ; but according to 
Livingstone, they are chiefly used in the defence of the 
young. The Palamedea (flg. 38) is armed with a pair of 
Fig. 38. Palamedea cornuta (from Brehm), shewing the double-wing-spurs, and the 
filament on the head. 
