illusteatio:ns. 7 



Page. 



Plate XLV. Necrotic Btomatitis (calf diphtheria) 466 



XL VI. Fig. 1.— Spleen in Texas fever. Fig. 2.— Normal spleen 484 



XLVII. Texas fever 484 



XLVIIT. The cattle tick (Margaropus annulatus) — the carrier of Texas 



fever 484 



XIJX. Portion of a eteer's hide showing the Texas fever tick {Marga- 

 ropus annulatus) of the United States 484 



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 ( Margaropv^s annulatus) 484 



LI. Map showing district infected with Texas fever of cattle 484 



LII. Verminous bronchitis 540 



TEXT FIGURES. 



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



four and one-half months 497 



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



eight months 499 



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



four months, with new pasture 500 



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



soiling method 501 



5. Pail spraying pump for small herds 503 



6. Hornfiy {Hmmatohia serrata) in resting position 520 



7. Hornflies {Jliematobia serrata) on cow horn 520 



8. Buffalo gnat 521 



9. Screw worm (larva of Chrysomyia macellaria) 522 



10. Screw-worm fly ( Chrysomyia macellaria) 522 



11. The warble fly (Hypoderma lineata) 523 



12. Short-nosed blue louse {Hsemntopimis eurysternus) of cattle 525 



13. Long-nosed blue louse (Haematopinus vituli) of cattle 525 



14. Red louse ( Trichodectes scalaris) of cattle 525 



15. Egg of short-nosed blue louse (Hsematopinu^ eurysternus) attached to a 



hair 525 



16. Mite which causes psoroptic scab of sheep 526 



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



tomum cervi) attached 530 



18. Twisted stomach worms (Ilasmonchu^ contortus) 530 



19. Twisted stomach worms {Hxmonchus contortus) 531 



20. Embryo of twisted stomach worm {Hsemonchu^ contortus) ccjiled on tip 



of grass blade 532 



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



hose, and a piece of brass pipe 533 



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



worm {Ostertagia ostertagx) 534 



23. A tapeworm ( Moniezia planissima) which infests cattle 535 



24. The common liver fluke (Fasciola hepatica) 537 



25. The large American fluke {Fasciola magna) 537 



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



liver fluke {Fasciola hepatica) 538 



27. Hydatids (Echinococcus granulosus) in portion of hog's liver 539 



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



of a steer 539 



29. Section of a pork tongue heavily infested with pork measles 540 



30 . Lung worms {Dictyocaulus viviparus) of cattle 541 



