244 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



Wheat bran 24 pounds 



Paris green 1 pound 



Oil of anise 1 ounce 



Corn bran 24 pounds 



Paris green 1 pound 



Syrup H quarts 



This poison bait was put out about 6 p. m., scattered by hand in the 

 cotton rows. At 9 o'clock a large number of beetles were feeding on 

 the bait. Only a few were seen feeding on that made of corn bran but 

 many on the wheat bran mash. Later observations showed that a 

 large number of beetles were killed by the latter and only a few by the 

 former. 



Encouraged by the results of the previous experiments Mr. Gembler 

 began putting out bait made according to the following formula: 



Wheat bran : 20 pounds 



Paris green 1 pound 



Syrup 1 quart 



Lemons 3 



He scattered twenty pounds of this mixture each evening about sun- 

 down as it was found that this was the best time because the material 

 dried out rapidly. There seemed to be some advantage in mixing the 

 bait the day before it was to be used, thus allowing the poison to become 

 more thoroughly soaked into the bran. From two to three acres could 

 be covered by twenty pounds of the bait. The best results were 

 obtained by putting it in the patches where the beetles were most 

 numerous as indicated by the exit and entrance holes. 



Excellent results came from the use of this poison bait for large 

 numbers of dead beetles were to be found where it was used. In some 

 places from five to eight dead were found on top of the ground in a 

 space the size of a man's hand. A large percentage also died after 

 entering the soil and many were found dead where they had crawled 

 several yards from where they had eaten of the poison. Twelve counts 

 were made in different parts of the field, each count measuring twenty 

 yards in length of the cotton row. The dead beetles in these spaces 

 ranged from 15 to 60 in number, averaging 32 to each count. The 

 records were made during the evening about 6 o'clock and only two 

 of these places had live beetles, one had one and another three crawling 

 about. These counts did not include those which had died after 

 entering the soil. 



Mr. Gembler substituted one teaspoonful of anise oil in some of the 

 bait and according to his observations the species preferred it to that 



