210 OESTRUS BOVINTJS. 



afterwards, another similar lump was felt on the right side of 

 the trunk. It also wandered about subcutaneously till a hole 

 opened over it, and it was forcibly rubbed out. A third made 

 its appearance over the spine, high in the chest, then travelled 

 up the neck, when for a time it was lost, and was supposed 

 to reappear on the right side of the neck, where a hole 

 formed over it. Now, [on 3rd March] I was fortunate 

 enough to be called, and observed a small, not inflamed 

 tumour, of the size of a large field bean, and having an 

 opening on the top as big as a pin-head. Peeping into this 

 hole, I saw one or two black points which rolled about. On 

 squeezing moderately the little lump, there was discharged a 

 living larva, half an inch long, evidently of the osstrus bovis, 

 and the same as those previously noticed by the girl. A 

 little dirty yellow juice issued with the animal, containing a 

 few blood globules and pus corpuscles. The girl says that, 

 while in Perthshire herding cows, she was much exposed to 

 the air, and was frequently stung by insects." 



TICKS. 



The ticks, keds, or fags, which are found on the skins of 

 horses, cattle, sheep, and dogs, are parasitic species of the 

 genus Ixodes or Eicinus of Latreille. They belong to the 

 class of Arachnida. 



The Dog Tick. Ixodes ricinus is of a reddish-brown 

 colour, with light red or greyish-brown abdomen. It is from 

 3 to 6 lines in length. It lives in woods, and passes on to 

 the bodies of cattle, sheep, and dogs, whose blood it sucks. 



The Ox Tick. Ochsenzecke of the Germans is Ixodes 

 reticulatus of naturalists. It varies from 5 to 6 lines in 

 length, is of an ash-grey colour, with dark red spots and cir- 

 cular stripes on its body. It lives on cattle and sheep. 



Usually mistaken with the ticks, are the Hippoboscidjs 



