ILLUSTRATIONS. 7 



Page. 



Plate XLI. Actinomycosis 438 



XLII. Actinomycosis of the lungs 438 



XLIII. Actinomycosis of the jaw 438 



XLIV. Section of muscle from a blackleg swelling 448 



XLV. Necrotic stomatitis (calf diphtheria) 448 



XLVI. Fig. 1. — Spleen in Texas fever- Fig. 2. — Normal spleen 486 



XLVII. Texas fever 486 



XL VIII. The cattle tick (Margaropus annulatus) — the carrierof Texas fever. 486 

 XLIX. Portion of a steer's hide showing the Texas fever tick (Marga- 



ropus annulatus) of the United States 486 



L. Figs. 1 and 2. — Dorsal and ventral views of male Texas fever tick 

 (Margaropus annulatus) . Figs. 3 and 4. — Dorsal and ventral 



views of replete female Texas fever tick ( Margaropus annulatus) . 486 



LI. Map showing district infected with Texas fever of cattle 486 



LII. Verminous bronchitis 514 



TEXT FIGURES. 



Fig. 1. Cleaning cattle and soil by the ' ' feed-lot ' ' method 479 



2. Cleaning cattle and soil by pasture rotation : . 481 



3. Horn fly ( Hxrnatobia serrata) in resting position 496 



4. Horn flies (Hxrnatobia serrata) on cow horn 497 



5. Buffalo gnat 498 



6. Screw worm (larva of Chrysomyia macellaria) 498 



7. Screw-worm fly Chrysomyia macellaria) 498 



8. The warble fly ( Hypoderma lineata) 499 



9. Short-nosed blue louse (Hsematopinus eurysternus) of cattle 501 



10. Long-nosed blue louse (Hsematopinus vituli) of cattle 501 



11. Bed louse ( Trichodectes scalaris) of cattle 501 



12. Egg of short-nosed blue louse (Hsematopinus eurysternus) attached to 



a hair : 501 



13. Mite which causes psoroptic scab of sheep 502 



14. Portion of the wall of the first stomach with conical flukes (Paramphis- 



tomum cerrl) attached 505 



15. Twisted stomach worms (Hxmonchus contortus) 506 



16. Twisted stomach worms (Hxmonchus contortus) 506 



17. Embryo of twisted stomach worm (Hxmonchus contortus) coiled on 



tip of grass blade 507 



18. A drenching tube made from an ordinary tin funnel, a piece of rub- 



ber hose, and a piece of brass pipe 508 



19. Piece of lining of fourth stomach showing cysts of the encysted stom- 



ach worm (Ostertagia ostertagi) 510 



20. A tapeworm (Moniezia planissima) which infests cattle 511 



21. The common liver fluke ( Fasciola hepatica) 512 



22. The large American fluke {Fasciola magna) 512 



23. Portion of grass stalk bearing three encysted cercarise of the common 



liver fluke (Fasciola hepatica) 513 



24. Hydatids (Echmococcus granulosus) in portion of hog's liver 514 



25. Thin-necked bladder worm (Txniahydatigena) from abdominal cavity 



of a steer 514 



26. Section of a pork tongue heavily infested with pork measles 515 



27. Lung worms ( Dictyocaulus vimparus) of cattle 516 



