EXTERNAL PARASITES. 177 



which it works its way gradually along a little gallery, at the end 

 of which it sits and with care may be found, presenting with 

 a good glass the appearance shown in our engravings of the 

 male and female. The colour varies with that of the dog, but the 

 insect is always more or less tinged with the blood it has 



The Female Mange insect magnified. 



devoured. Its eggs are very large, and coated with a sticky 

 substance, by which they adhere to the legs of the female till 

 they are deposited in the gallery made by her. When first 

 hatched the young are small, but quickly grow, and each making 

 a separate gallery or passage, the irritation in the skin rapidly 

 increases, and the true scabby mange described at page 141 is 

 produced. It is unnecessary to repeat the treatment which is 

 alluded to at that page. 



