^QQ THE FRIENDS OF CATERPILLARS 



honey is secreted, and we have at least one form 

 which has come to have an entirely carnivorous 

 diet, feeding upon plant lice bodily for their juices, 

 very likely for the same reason that the ants seek 

 their secreted fluids in detail. So, too, and possibly 

 for the same reason, these creatures not unfre- 

 quently show a cannibalistic tendency, feeding upon 

 the bodies of their own brethren when they are in 

 a helpless condition, as previous to pupation. All 

 these subjects are closely related to one another, 

 and need to be investigated more carefully in order 

 to a complete solution of their meaning. 



It is a curious thing that among the Lycaenini 

 these glands are found on some species while not 

 found upon others closely allied ; their occurrence 

 in many members of the other two tribes of the 

 Lycaeninae, together with the impossibility of 

 their independent origination in different genera, 

 render it probable that these glands first arose as 

 long ago as before the differentiation of the three 

 tribes of Lycaeninae. The brotherhood of the ants 

 and the caterpillars may therefore be of great 

 antiquity. 



