PERVERSION OF RACE CHARACTER 143 



above described justify distinguishing the harmless 

 looking flies as "the ordinary hereditary," or "true" 

 race type? And the wasp-like as the "exceptional 

 false" type, which owes its existence to natural 

 selection when the race is crowded by its enemies 

 and which will tend to disappear whenever these 

 enemies of the race are overcome? 



If of these harmless flies a variation could have 

 been reported, which had endowed them with the 

 poisonous stings and aggressive dispositions of 

 wasps without changing their appearance, that 

 would have illustrated the various bearings of the 

 difference between a true hereditary and false excep- 

 tional race type much better, although it would 

 not have been a case of mimicry. If such a variety 

 had arisen and had used its destructive proclivities 

 against its gentler race fellows, that would have 

 been almost the greatest possible hindrance to 

 normal race progress. 



The production of such a variety from the harm- 

 less type is, however, so easily within the powers 

 of variation and natural selection, which have 

 achieved the far greater contrast between amoeba 

 and man, that its non-existence is a mere accident 

 which can make no difference in the bearing which 

 these considerations will have on future arguments. 



A few illustrations of the principle developed thus 

 far, viz., that traits of character may be recognized 

 by outward appearances, will make the progress of 

 the argument clearer. 



