THE CANADIAN ENTOMOLOGIST 75 



led US to believe that the same measure would prove to be a specific 

 for the Bedbug (Cimex lectiilarius) and other household insects. 

 In the month of July, 1914, we had an opportunity of testing this 

 likely remedy in a boarding-house, badly infested with Cimex, 

 and the results came up to our best expectations. 



The house was an eight-roomed, two-storey frame building, 

 situated near Vineland, Ontario, and was furnished with iron and 

 wooden bedsteads, varnished dressing tables, plain and varnished 

 tables, chairs and the usual bric-a-brac. The heating system 

 consisted of a hot-air furnace in the basement, with shafts leading 

 into all the rooms, and a kitchen stove and parlour heater on the 

 first flat. 



The fires were started at 9.30 a.m., thermometers were placed 

 in different parts of the house and the temperatures were noted 

 every hour. The following table shows a record of the tempera- 

 tures in three of the bedrooms on the upper storey: 



Time No. 3 No. 4 No. 5 



9.30 78 F. 77 F. 78 F. 



82 • 92 



95 102 



99 117 



109 126 



115 136 



122 142 



127 148 



138 149 



140 158 



140 154 



140 153 



Outside temperatures: Maximum, 73 F. Minimum 64 F. 

 Thermometers: No. 3 — -On wall in 1st infested bedroom. 

 No. 4 — On bed in 2nd infested bedroom. 

 No. 5 — On wall in 3rd infested bedroom. 

 At 1.30 p m. many of the adults and nymphs had succumbed, 

 and by 4.30 p.m. they were all dead. However, the heating was 

 not discontinued at this point, but was prolonged until 7.30 p.m. 

 because it was considered probable that it would take a longer 



