44 SEAT OF THE SENSE OF SMELL 



found that in some cases (though by no means in all), 

 insects which had been deprived of their antennae still 

 appeared to possess the sense of smell. But if, as we 

 have, I think, good reason to suppose, the power of 

 smell resides partly in the palpi, this would naturally 

 be the case. 



He also tested a beetle, Silplia tJioraeica, with oil of 

 rosemary and assafoetida. It showed its perception 

 by a movement in half a second to a second in the 

 case of the .oil of rosemary, and rather longer — one 

 second to two seconds — in the case of the assafoetida. 

 He then deprived it of its antennae, after which 

 it showed its perception of the oil of rosemary in 

 three seconds on an average of eleven trials ; while in 

 no case did it show any indication of perceiving the 

 assafoetida even in sixty seconds. 



This would seem to indicate a further complication — 

 not only that both the antennge and the palpi may 

 possess the sense of smell, but also that certain odours 

 may be perceived by the former, and others by the latter. 



Graber questions some of the experiments which 

 seemed to me * to demonstrate the existence of a sense 

 of smell in ants.f 



* *' Ants, Bees, and Wasps." 



t He says, "Da Lubbock noch hinzufiigt, dass keiner, der das 

 Benebmen der Ameisen unter dieseu Umstandeu beobacbteu wiirde, 

 den geringsten Zweifel an ibrem Gerucbsvermogen baben konnte, 

 wablte icb aucb diese Metbcde, um zu erforscbeu, wie sicb etwa der 

 Fubler beraubte Ameisen verbalten wiirden. Icb war nicbt weuig 

 iiberrascbt zu finden, dass aucb diese (es bandelt sicb um Formica 

 rufa) vor dem Riecbobjekt umkehrten. Um ganz sicber zu geben, 

 versucbte icb's aber nocb mit dem gleicben Arrangement aber mit 

 Weglassung des Biechstoffes, uud sicbe da ! sie kebrten aucb jetzt nocb 

 um ! Bei genauerer Beobacbtung der von einer Ameise vom Aufang 

 an auf dem Papiersteg zuriickgelegtcn Strecke stellte sicb aucb bald 



