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N. E. McINDOO 



tus, in which capacity they inform the insects «^;^f ^^f f^^^^ 

 innkediately in front of them. In case of the honey-bee, they 

 S also be sensitive to the weak currents of a- -u-d ^.y 

 workers fannmg. It is possible that the sense hairs are not 

 affected by these weak currents, and therefore some method is 



Fig. 13 Diagram, representing a block taken from terminal antennal seg- 

 ment of worker honey-bee, showing tactile hairs {Thr), pegs {Pg), pit pegs (PP), 

 Forel flasks (Fl), and pore plates (P) in both perspective and in section, a and 

 c, light colored bands; b, dark band; d, inner groove; and m, double, hinge-like 

 membrane of pore plate; St, nerve strand; SCG, sense cell group. 



badly needed to keep the bees constantly informed whether or 

 not the fanners are workhig properly. If these interpretations are 

 correct, we here have another form of touch. Of course these 

 organs might also be sensitive to wave vibrations of a very low 

 frequency, but if this interpretation is correct, we would yet 



