THE ANOPLURA 167 



1 part, lard 4 parts, rubbed over the body, or washing with dilute car- 

 bolic acid using 1 part of the acid in 30 parts of water. The most usual 

 treatment for cattle lice, however, is by the use of stavesacre (Delphin- 

 ium) seeds. Four ounces of these seeds and 1 oz. of white hellebore are 

 boiled in a gallon of water until only 2 qt. remain. This is then applied 

 with a brush to the animals. It may need to be repeated if more lice 

 appear, showing that eggs or some of the lice escaped the first application. 

 Raw linseed oil, applied with a brush has recently been recommended as 

 an alternative treatment, the material for one animal costing about five 

 cents. 



The relation of insects to disease as has been brought out above, 

 where lice serve to convey the germs or parasites causing illness to man, 

 is one of the newer subjects in Entomology but one which has been shown 

 to be of great importance. Medical Entomology is already a large field 

 upon which much has been written, and yet one about which little is 

 probably known in comparison with its actual size. 



