GRUB OF THE SKIN MANGE. 273 



Mr. Dyson (of Park Lane, London) told rae that some one came into 

 his yard one day, and, talking on the subject, declared oil of tar to be a 

 remedy infallible for this affection. 



GRUB OF THE SKIN. 



Long as this affection has been known to breeders, and 

 to almost every one who has had to attend upon young 

 horses, yet it has met with no attention from veterinary 

 authors. It has, however, been commented upon by con- 

 tinental writers, and, up to the present time, the best, 

 account we have of it in the native language, is to be found 

 in the 'Veterinarian' for 1850. Years ago, I used to 

 regard the knots found upon the backs of horses as saddle- 

 galls. I now, however, know better. They arise from the 

 deposit of larvae of the lypodium equis. 1 have myself seen 

 the tumefaction caused by such irritations extend several 

 inches around the site of the grub, and a great deal of 

 irritation result from it. On the other hand, during the 

 winter, they remain about the magnitude of lentils, feeling 

 like pins' heads buried underneath the skin. They form 

 abscesses, and discharge pus. They are best cured by dila- 

 tation of the opening, squeezing out the grub, and destruc- 

 tion of the sac with some escharotic, after which they 

 quickly heal by granulation. 



MANGE. 



I believe that all quadrupeds are liable to an affection 

 of this kind. The most remarkable characters of mange 

 are, the annoying itcliing, and the bare places it occasions. 

 A mangy horse will rub himself against any part of the 

 stable or yard; he will even rub himself against his com- 

 panions, should he be at grass; and, by violent friction, 

 will excoriate the diseased places, thus aggravating the 

 malady. Though no part of the skin can be exempt from 

 mange, the places it commonly occupies are the neck, 

 shoulders, withers, sides, thighs, and head. Professor Cole- 



I. 18 



