GRASSHOPPERS AND OTHER INJURIOUS INSECTS OF 1911 AND 1912. 79 



of infestation. The candle, or candles (for this remedy calls for 

 a heavy dose of sulphur) should be placed in a metal dish, and this 

 dish in a much larger vessel containing- water, thus taking all pre- 

 caution against a boiling over of the burning sulphur, and setting 

 fire to the carpet. Close all apertures, including the keyhole, set 

 fire to sulphur and shut the door, leaving the room closed for five 

 or six hours. All metal such as nickel or brass, or silver (or gilt) 

 will be tarnished if exposed to the fumes of sulphur, and should be 

 removed from the room before the operation, or coated with vase- 

 line. ' 



Other more radical treatments are those of fumigation either 

 with bisulphide of carbon or with hydrocyanic acid gas, the latter so 

 dangerous to human life that it should only be used in extreme cases 

 and under the direction of a practical entomologist, familiar with 

 its dangerous properties. In fumigating with bisulphide of carbon 

 about one pound of the liquid for every 1,000 cubic feet of space 

 should be the proper proportions, placed in flat dishes, earthenware, 

 crockery or wood. The operator should avoid breathing the fumes 

 arising from this compound, and as this gas, when mixed with air, 

 is highly explosive no light of any kind should be brought near the 

 liquid, or into the room which is being treated until such room has 

 been thoroughly aired. As bisulphide of carbon tarnishes, as it vol- 

 atilizes, all metal, nickel, gilt, silver and the like should either be re- 

 moved or covered with a coat of vaseline which will protect them. 

 Close the room or rooms tightly for forty-eight hours, then open and 

 ventilate. As the fumes coming- from this compound are not only 

 disagreeable, but also when breathed to any extent, cause sickness 

 which might even, in extreme cases be fatal, the house should be 

 vacated during treatment, and where one house of a duplex, or a 

 ''flat" is infested, there are serious objections to this method. 



This division has found the folloiving solution very effective: 

 Corrosive Sublimate, 1 oz., alcohol, 1/2 pmi, turpentine, y^, pint, 

 thoroughly mixed. Spray this into cracks and crevices on bedsteads 

 and elsewhere ivhere the bugs may be secreted. Two or more ap- 

 plications at intervals of two weeks may be necessary. If an ato- 

 mizer cannot be obtained use a feather, or very fine brush. Label 

 the compound POISON, and keep it out of the reach of children. 



An old remedy is as follows: Spray joints and cracks with 

 equal parts of kerosene and turpentine, then fill all cracks so treated 

 with hard soap. 



To make them leave a bed at least temporarily, the following is 

 proposed. We have never seen this tried, and do not speak of it 



