THE MONTHLY BULLETIN. 



779 



mites. Oil Au,mist 5th a sheet of sticky fly paper on a board was nailed 

 to a telephone pole twelve feet from the ground, one hundred feet 

 north of a hadly infested ten-acre almond orchard of very large trees. 

 The spiders found on the sheet the next day were very numerous. On 

 August 10th the sticky paper was placed 250 feet from the orchard 



Fig. 407. — Close view of the apparatus showing 

 tlie legs standing in cans of water and oil. (Photo 

 by Geo. P. V\^eldon.) 



and 30 feet from the ground on top of a tank house. Spiders were 

 found on the paper the next day. The next test was made 650 feet 

 from the infested orchard and the paper placed fifty feet from the 

 ground on top of a school house, with the result that many spiders 

 were found on the paper the next day. 



