810 



DISEASES OF CATTLE. 



LICE. 



^^^Kr^fc- These troublesome 



|lj|||§| ^. insects abound among 



- ! >£?*||f| ill-cared-for cattle, and 



m*sM& m. sometimes materially 



retard tlieir growth 



i ®S^ff-'^ ; 112*iI^i^R< an< ^ development; Sev- 



^^^^^^mStmbm^^^kt^ \ i^il^lP era ' different forms are 



^^^^S ^^1 BHEI^^fc^*^' ^ escr 'b e d by helmin- 



n^^^^^^m^^^^^ 1 - " r % thologists, but the spe- 



Wi-:'^^^^^m£^^m^ '**'S'' '^S^iPlislSl cies most commonly 



^P^^^^^^. B1P seen are ' our ln num " 



vifimfwMp ^^mSS^ ber, and are shown in 



flftMMMVMMMM«»«»> p . 1Q69 im wn 



Fig. 1065.— Gad-fly (Oestrus Bovis). ^ ..„*.„ 



Of these, the trichodectes (Fig. 1071) is less common than others. 



To remove these pests a strong decoction of tobae"co water may 

 be used. The following formula is recommended as being both safe 

 and destructive to the lice : — 



- Stavesacre seed .' 4 oz. 



White hellebore . . . ' 1 '• 



Water :......'. 1 gal. 



Boil until only two quarts remain, and apply with a brush. 



MANGE. 



This unpleasant disease, though more 

 common in the horse and dog, is not 

 rare among poorly-fed and neglected 

 animals. The parts first affected are 

 frequently the face, head, and neck. 

 It is caused by an insect, the derma- 

 6 tocoptes, which lives on the surface of 



Fig. 1066. — Gad-fly. the skin, occasioning much irritation 



a, Larva, or "grub;" b, Insect.. by biting. _ The treatment is prac- 

 tically the same as that for mange in 

 the horse (Part I.), which see. 



Fig. 1074 represents the gamasus of musty hay, which is some- 

 times found on the skin of cattle. 



RINGWORM. 



This affection (Fig. 1075), an exceedingly troublesome one, is 

 due to a fungus, or vegetable parasite, originating from a spbre 

 which has gained entrance to a hair-follicle. It is very contagious, 

 being communicable from man to the lower animals, and vice versa. 



