DEPARTMENT OF ZOOLOGY AND ENTOMOLOGY. 



169 



ought to be of a laxative nature ; warm bran maslies, and the like, have a 

 good effect. When the laxative has done acting, the IS'itrate of Potash may 

 be given as above. 



During the last two summers I have had occasion to treat a number of 

 cases, the result of over-driving, on very hot days, and have found very great 

 benefit from the free use of Nitrate of Potash. I gave 1^ ounces in a pint of 

 water every four hours until 3 doses had been given, then stopped for 8 hours, 

 when the doses were to be repeated. I would repeat a second time if the 

 patient was not doing well ; laxative food should be given and the animal 

 allowed to drink somewhat sparingly. 



The local treatment is of great importance and consists in the application 

 of moisture, in the shape of water, to the feet, which may be applied in the 

 manner most convenient, in moderate weather. I have found very beneficial 

 effects from standing an animal in a stream of water for several hours a day, 

 taking care, however, that their bodies were well protected from inclement 

 weather, or hot sun. 



When animals have a desire to lie down, apply wet swabs to their coronets. 

 In other instances a puddle made with blue clay and water, about the con- 

 sistence of fresh, glazier's putty, to which a few handsful of salt may be 

 added, has proved useful. The puddle shoulxl be made so that the horse will 

 sink into it, for from about four, to six inches. 



Exercise should be given from the first, and should be repeated three times 

 a day, being increased from say ten minutes to half an hour at a time, as the 

 horse gets better. Animals that progress favorably from the beginning may 

 be driven moderately in about two weeks. 



E. A. A. GRANGE, 



April 30, 1887. Prof, of Veterinary Science. 



No. 26.— DEPARTMENT OF ZOOLOGY AND ENTOMOLOGY. 

 PLANT LICE AND THE CODLING MOTH. 



Perhaps no family of insects is more widely distributed, more generally 

 destructive and better known than Plant Lice. (Fig. 1.) 



In our green-houses, on window plants, 

 and on almost all outdoor vegetation 

 their harmful work is seen. Nor do they 

 confine themselves to any single part of 

 a plant. Some work on the roots and 

 sap the vitality of the herb or tree ; oth- 

 ers draw their nourishment from the 

 stems and twigs, and thus blight the 

 plants; still others suck the vitality 

 from bud and foliage. A few, possibly 

 ^. , ^^i^v^V) , , . more than we are aware of, work on both 



Winged and Wingless Lice, , ^, Tj'ii_ iij_ 



natural size and magnified. rOOtS and leaVCS. It IS aiSO trUC that 



Plant Lice are very generally distributed. Most all of our 

 cultivated vegetables, grains, and trees have their character- 

 istic plant louse enemies. Not only are these insects widely 



22 



