The Black- Bellied Tarantula 41 



If the instinct of these scientific murderers is 

 not, in both cases, an inborn predisposition, 

 inseparable from the animal, but an acquired 

 habit, then I rack my brain in vain to under- 

 stand how that habit can have been acquired. 

 Shroud these facts in theoretic mists as much 

 as you will, you shall never succeed in veiling 

 the glaring evidence which they afford of a 

 pre-established order of things. 



