. Bulletin of the Department of Agriculture. Agriculture. FLEAS. 29 In this instance, however, it was used mainly to protect the workmen who were clearing up flea-infested premises. Lights have been used as traps for the adults in some instances. The results will no doubt vary with the species of flea concerned. A light trap which was used by Mr. E. M. Ehrhorn, formerly of San Francisco, is described by Dr. Howard, as follows: Fill a glass three-fourths with water, on top of which pour about an inch of olive oil, then place a night float (a little wick inserted in a cardboard disk or in a
. Bulletin of the Department of Agriculture. Agriculture. FLEAS. 29 In this instance, however, it was used mainly to protect the workmen who were clearing up flea-infested premises. Lights have been used as traps for the adults in some instances. The results will no doubt vary with the species of flea concerned. A light trap which was used by Mr. E. M. Ehrhorn, formerly of San Francisco, is described by Dr. Howard, as follows: Fill a glass three-fourths with water, on top of which pour about an inch of olive oil, then place a night float (a little wick inserted in a cardboard disk or in a cork disk) in the center of the oil. Place the tumbler in the center of a soup plate filled with strong soapsuds. The wick should be lighted at night on retiring, or may be used in any dark room. As the soup-plate soapsuds trap is placed ou the floor of the room, it does not inter- fere with the sleeper, and the fleas which are on the floor are attracted to the light. A small flea trap which is extensively used in parts of China, and is said to be very beneficial, has recently been described by Dr. E. Hindle. In China two pieces of bamboo are used in con- structing the trap. A modified form of this trap, which can easily be constructed by anyone, is illustrated in figure 9. To construct the trap, bore two holes, about an inch and a quarter in diameter, in a board any- where from one-fourth to 1 inch in thickness. With a keyhole saw or a pocket knife cut out a disk of the board around each of the holes about 2| inches in diameter. Take a piece of wire net- ting, with one-fourth or one-half inch square soldered mesh, about 2 feet wide, and tack it around the disks, having one at either end. Cut off the wire, leaving the ends long enough to overlap along the side of the cylinder, and bend the ends in to complete the cylinder. Around a broom handle or other stick about an inch in diameter and equal to the length of the cylinder wrap a piece of sticky fly paper, sticky side out; ta
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