TABLE OF CONTENTS. 



Page. 



Letter of transmittal 7 



General remarks 9 



Parasites of the nose : 



Grub in the head, (Estrus ovis, Linn 25 



Parasites of the skin : Phthiriasis, Acariasis. 



The sheep tick, Melophagus ovinws, Linn ; 39 



The sheep louse, Triohodeetea sphcerocephalua, Nitzsch 45 



The goat louse, Triohodeotes Umbatus, Gervais, and Trichodectes climax, 



Nitzsch ■. 49 



Scab insects : Acariasis, itch, scab. 



Head scab, Sareoptea aoabiel, de Geer, var. ovis 53 



Common scab, Psoroptes communis, Fiirst, var. ovis 56 



Foot scab, Chorioptes communia, Verheyen, var. ovis 65 



Parasites of diverse organs : 



The pentastoma, LinguatulatcsnioidBS, End 69 



Immature tape-worms : 



Bladder worms, Twnia marginata, Batsch 72 



Gid or staggers. Taenia coennrm, KUch 83 



Hydatids, Tosftia ecAi«ococcMS, V. Sieb 86 



The mutton measle, Tcenia tenella, Cobbold 87 



Parasites of the alimentary canal and appendages : 



Adult tape-worms : 



The fringed tape- worm, Tcenia fimbriata, Diesing 89 



The broad tape-worm, Tcenia expansa. End 113 



Liver-flukes : 



The large liver-fluke, Diatoma liepatieum, Linn 127 



The small liver-fluke, Distoma lanceolatum, Mehlis .* 137 



The stomach worms : 



Amphiatoma conicum, Zeder 138 



Strongylua contortua. End 141 



Intestinal round worms : 



Introductory remarks 145 



Strongylus fiUcollis, Eud 146 



Strongylua ventrioosua. End 149 



Aacaris lumbricoidta, Linn 151 



Doehmiua cernuus, Creplin 155 



Scleroatoma hypoatomum, Diesing 161 



The nodular disease of the intestine, (Eaophagoatoma CoUimbianum, n. sp 165 



Triohocephalua affinia, Eud 181 



Parasites of the lungs : 



Introductory remarks 185 



The hair lung-worm, Strongylua ovis-pulm,onalia, Diesing 166 



The thread lung- worm, Strongylua filaria. Hud 201 



3 



