228 



DISEASES OF SHEEP. 



symptoms.of jtcliing or irritation appear. The sheep-grower should pay strict atten- 

 tion to the health of liis animals, and such care and attention will be abundantly 

 repaid. 



Below we give the figures of the acai-i, that produce the scab as delineated by M. 

 Waltz:— 



(Fig. 28), the female of 366 times the natural size, larger than the male, of an oval 

 form, and provided with eight feet, four before and four behind ; a the sucker \ bbbb 

 the four anterior feet, with their trumpet-like appe'ndiccs; cc the two interior hind 

 feet; dd the two outward feet, the extremities of which are provided witli some long 

 hairs, and on other parts of the legs are shorter hairs. To these hairs the young 

 ones adhere when they first escape from the pustule— e, the tail, containing the anus 

 and vulva, garnished by some small hairs. (Fig. 29). 'i'he male on its back, and 

 seen by the same magnifying power; a the sucker; bbbb the fore-legs, with their 

 trumpet like appendices, as seen in the female cc, the two hind legs, with the same 

 appendices and hairs ; d the rudiments of the abdominal feet ; e the tail. — S.] 



SECTION XIII. 



LICE, TICKS, AND FLIES. 



Sheep, and especially if they are neglected and poor, are often 

 sadly annoyed by these vermin. Tiiey frerjucntl}^ precede the scab: 

 the dreadful itching which they occasionally cause, prepares for or 

 produces the scab, or they multiply most ra})idly when the skin is 

 fouled by the scab. The sheep-louse is too well known to every 

 shepherd : it is of a brownish or reddish colour, with a flat body, and 

 three legs on cither side : the tick has a large round body, and small 



