THE ACARINA OR MITES— BANKS. 



99 



Fig. ls7.— Dtodectes cy- 



NOTIS, TIP OF MALK AB- 

 DOMEN, AND HIND LEGS. 



.sanie places from other causey. The loss is usually heaviest in autumn 

 and earlv winter. Sheep if not treated may soon become so enfeebled 

 throug-h fatio-ue and lack of rest as to die. The best remedy is to dip 

 the sheep in some poisonous solution. Various dips are in us(\ mostly 

 based on tobacco, sulphur, tar, or lime. The fa- 

 mous Rutherford dip, which has been very suc- 

 cessful, is prepared by using- one pound of tol)acco. 

 one pound of sulphur, and four gallons of water. 

 The tobacco is steeped for some time in the water. 

 th(i sulphur is added to this tobacco w^ater, and th( n 

 the mixture is diluted b}^ the requisite amount of 

 water. It is best used warm. It is customary to 

 give another dip al)out six or eight days after th(- 

 tirst, so as to catch the mites that have hatched since 

 the tirst dip was applied, (xillette has used an ' 

 per cent kerosene enudsion. and considers it 



cheaper than anything 

 else. It is said that 

 in Europe shepherds 

 apply a salve contain- 

 taining mercury and oil of turpentine. 

 If the shep have been kept in stal)les, these 

 should be cleaned, the surface soil re- 

 moved, and the woodwork whitewashed 

 to a height of four feet. 



The species of CJtorloj'tcs do not bur- 

 row in the skin, but produce a scab similar 

 to sheep-scab; but it is restricted to cer- 

 tain parts of the animal, as the feet, the 

 ears, or neck. They ;ire amenable to the 

 same treatment as the I^sorojdeti. Species 

 occur on the horse, ox, sheep, and goat. 

 The genus Not(>edre><^ differing from Sar- 

 cojjfe.s in the dorsal anus, occurs on cats 

 and rab))its. Prosoixxledrs is limited to 

 bats, and burrows in the tissues of the 

 ears. Caparin'm occurs on a few wild 

 animals, and Otodecte>< lives in the ears of 

 dogs and cats; O. cygnoti^ Hering has 

 been taken in this countr}" . Animals may 

 l)e so tormented by these parasites that 

 they have convulsions or hts. The purulent matter should be care- 

 fully removed, and the ears bathed and injected with olive oil contain- 

 ing one-tenth part of naphthol. 



The genus Cnt'niidocojdes contains a number of species that occur 

 on various birds, including poultry. Some live at the base of the 



Fig. 1S8.— Psoroptes communis, yap. 

 ovis, fe.male and caroxcle en- 

 larged. 



