6 ILLUSTEATIONS. 



Page. 



Plate XL. Actinomycoaia of the jaw 448 



XLI. Actinomycosia of the lungs 448 



XLII. Section of muacle from a blackleg swelling 464 



XLIII. Necrotic stomatitis (calf diphtheria) 464 



XLIV. Normal spleen and spleen affected by Texas fever 504 



XLV. Texas fever 504 



XLVI. The cattle tick (Ilargaropus annulatus), the carrier of Texas fever. 504 



XLVII . The cattle tick ( Margaropus annulatus) 504 



XLVIII. Portion of a steer's hide showing the Texas fever tick {MiirgaropaH 



annulatus) 504 



XLIX. Fig. 1.— Tick-infested steer. Fig. 2.— Dipping cattle to kill ticks. 504 

 L. Map of the United States showing region infected with Texas fever 



of cattle 504 



TEXT FIGURES. 



Fig. 1. Plan for freeing cattle and pastures from ticks by rotation, requiring 



fom- and one-half months 489 



2. Plan for freeing cattle and pastures from ticks by rotation, requiring 



eight months 491 



3. Plan for freeing cattle and pastures from ticks by rotation, requiring 



foiu: months, with new pasture 492 



4. Plan for freeing cattle and pastures from ticks by rotation, feed-lot or 



soiling method 493 



5. Pail spraying pump for small herds 495 



6. Hornfly (Humatohia serrata) in resting position 512 



7. Hornflies ( Hiematobia serrata) on cow horn 513 



8. Buffalo gnat 513 



9. Screw worm (lar^'a of Chrysomyia macellaria) 514 



10. Screw-worm fly ( Chrysomyia macellaria ) 514 



11. The warble fly (Hypoderma lineatii) 515 



12 . Short-nosed blue louse (Hsematopinus eurysternus) of cattle 518 



13. Long-nosed blue louse {Hsematopinus vituli) of cattle 518 



14. Bed louse ( Trichodecles scalaris) of cattle 519 



15. Egg of short-nosed blue louse (Hsematopinus euryst-ernus) attached to a 



hair 519 



16. Mite which causes jisoroptic scab of sheep 520 



17. Portion of the wall of the first stomach with conical flukes { Puram.phis- 



tomum cervi) attached 505 



18. Twisted stomach worms {Hmmonchus contortus) 525 



19 . T%visted stomach worms {Sxmonchus contortus) 526 



20. Embrjfo of twisted stomach worm (Exmonchus contortus) coiled on tip 



of grass blade 50^ 



21. A drenching tube made from an ordinary tin funnel, a i>iece of rubber 



hose, and a piece of brass pipe 527 



22 . Piece of lining of f oiuth stomach showing cysts of the encysted stomach 



wonn {Ostertagia ostertagi) 503 



2?. . A tapeworm ( Moniezia planissiina) which infests cattle 509 



24. The common liver fluke (Fusciola hepatica) 53]^ 



25. The large American fluke {Fusciola magna) 53]^ 



26. Portion of grass stalk bearing three encysted cercariie of the common 



liver fluke {Fasciola hepatica) 532 



27. Hydatids {Echinococcus granulosus) in portion of hog's liver 533 



2S. Tliin-necked bladder worm (Txnia hydatigena) from abdominal cavity 



of a steer 53^ 



29. Lung worms (Dictyocaulus vivipanis) of cattle -.-.... 535 



