262 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 14 



used on the 24th were left in position over night and used on the 25th . 

 In series 2, 3, and 4, the original samples used on the first day of each 

 series were left in position at night and run for the entire period. The 

 total nimiber of crickets and grasshoppers for each material and each 

 series is indicated in Table 1. 



Table I. 



Crickets 



Grasshoppers 



The most remarkable feature of the whole experiment is not the dis- 

 covery of a first rate repellent but the relative unconcern with which 

 both crickets and grasshoppers ate the bran even when heavily treat- 

 ed with materials commonly regarded as repellents and especially the 

 almost unbelievable fondness shown for soap. This is shown, not on- 

 ly by the record of counts made, but was especially noticeable while 

 the experiment was in progress. In the case of Series 4, practically 

 the entire sample of bran treated with soap was consumed by the end 

 of the fourth day. This peculiarity of taste was noted as soon as soap 

 was added to the series and subsequently extreme care was taken to 

 make sure that it was the result of an actual liking for the soap and not 

 due to a possible slip in technique. It might be stated that a later 

 field test proved the value of soap not only as an attractive substance 

 when used in the preparation of poison mash but by its use as an in- 

 gredient, the mechanical condition of the mash was improved consid- 

 erably. 



