III.] INDEFEXDEXT SIMILARITIES OF STRUCTURE. 97 



rapidly flying a.nd mimicked kinds have not had the wing 

 modified. Such an enemy occasioning increased powers of 



.-i 



OUTLINES OF WINGS OF BUTTERFLIES OF CELEBES COMPARED WITH THOSE OF 



ALLIED SPECIES ELSEWHERE. 



1. Outer outline, Papilio gifjnn, of Celebes. Inner outline, P. demoUon, of Sin^aimre 

 and Java.— -2. Outer outline, P. miletu^i, of Celebes. Inner outline, P. ^arpcdon, 

 India. — '6. Outer outline, Tachyris zaHiida, Celebes. Inner uulliiie, T. nero. 



flight, or rapidity in turning, he adds, " one wouhl 

 naturally suppose to be an insectivorous l)ird ; hut it is 

 a remarkable fact that most of the genera of fly-catchers 



H 



