798 BOARD OF AGKICULTURE, 



sidos nearly parallel, with strong eminences just back i»f the antennae, 

 which are set on the side of the head midway from rostrum to occiput; 

 the legs are lighter with dark hands at the joints; the spiracles are en- 

 closed by a black chitinons eminenoo, and there is a broad black band on 

 the last segment, broken near the middle. 



The male has the abdomen marked beneath with a large black area 

 extending forward from the terminal segment. On the feet is an organ 

 that helps the louse to cling to the hair. 



The eggs are six-luindredlhs of an ineli in Icuglli, by three-huudredths 

 of an inch in width. They are slightly yellow or dusky whitish in color, 

 and taper somewhat toward the point of attachment. They are usually 

 attached near the base of the hairs. 



Treatment.— It is more difficult to kill the lice scattered around the 

 hog house and yards than it is the ones on the hogs; for this reason it is 

 difficult to get rid of the lice in a drove of hogs, as they again become 

 affected in the sleeping quarters or about the pen. The hair affords but 

 little protection for them, and makes the application of remedies for their 

 destruction quite easy. A number of different remedies and methods of 

 applying them can be used. Kerosene, any of the coal tar products and 

 crude petroleum are common remedies. The hog can be sprayed or 

 dipped with these preparations. 



An ingenious method of applying the oil is by means of the rubbiag 

 post. A good solid oak post a foot or a foot and a half in height is placed 

 in position in the hog lot. One hole is bored in the top at a depth of 

 about eight inches and two at right angles from the side at the bottom 

 of the vertical hole. Soft pine pins are driven in the side holes. The up- 

 right hole is filled with kerosene and stoppered. Next a burlap strip 

 eight or ten inches wide is wrapped around the post over the side holes. 

 This after a time becomes soaked with kerosene and the pig will rub 

 against it at the place where it will do the most good. This is not a very 

 thorough way, however, of using the remedy. A better way is to use 

 a spray pump having an attachment for mixing the oil and water. Five 

 parts of water and one part of oil should be used. Three or four spraj'- 

 ings are required to kill all of the lice. The work should be done at in- 

 tervals of a week and in the evening. If done in the evening, by the 

 next morning the oil is evaporated and there is no danger of the sun 

 blistering the skin, as would be the case if sprayed during the early 

 part of the day. 



The coal tar preparations are to be preferred as remedies for lice. 

 These are zenolium. clilotonaptholiuni. milk oil. daytholeum and a num- 

 ber of others. The hog can be sprayed or dipped with any of these 

 preparations. Dipping is to be preferred, as it is a very effective method 

 of getting rid of lice. Pigs a few weeks old can be caught and immersed 

 in a barrel. If a large number are to be treated it is best to have a dip- 



