6 ILLUSTEATIONS. 



Page, 



Plate XL. Actinomycosis of the jaw 448 



XLI. Actinomycosis of the lunga 448 



XLII. Section of muscle 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 {Margarojms 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 {Margarojms 



annulatus) 504 



XLIX. Fig. 1.— Tick-infested steer. Fig. 2.— Dipping rattle 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 



four 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 jjump for small herds 495 



6. Hornfly {Hsematobia serrata) in resting position 512 



7. Hornflies {Hsematobia serrata) on cow horn 513 



8. Buffalo gnat 513 



9. Screw worm (larva of Chrysomyia macellaria) 514 



10. Screw-worm fly {Chrysomyia Tuacellaria) 514 



11. The warble fly {Ilypoderma lineata) 515 



12. Short-nosed blue louse {Hsematopinus eurystemus) of cattle 518 



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



14. Red louse ( Trichodectes scalaris) of cattle 519 



15. Egg of short-nosed blue louse {Usematopinus eurystemus) attached to a 



hair/. 519 



16. Mite which causes psoroptic scab of sheep 520 



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



tomum cervi) attached 525 



18. Twisted stomach worms {Ilxmonchus contortus) 525 



19 . Twisted stomach worms {Ilsemonchus contortus) 526 



20. Embryo of twisted stomach worm {Exmonchus contortus) coiled on tip 



of grass blade 527 



21. A drenching tube made from an ordinary tin funnel, a piece of rubber 



hose, and a piece of brass pipe 527 



22. Piece of lining of fourth stomach showing cysts of the encysted stomach 



worm {Ostertagia ostertagi) 528 



23. A tapeworm ( Moniezia planissima) which infests cattle 529 



24. The common liver fluke {Fasciola hepatica) 531 



25. The large American fluke {Fusciola magna) 531 



26. Portion of grass stalk bearing three encysted cercari«e of the common 



liver fluke ( Fasciola hepatica) 532 



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



28. Thin-necked bladder worm {Tsenia hydatigena) from abdominal cavity 



of a steer 534 



29. Lung worms {Dictyocaulus viviparus) of cattle 535 



