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This is true of the larva? of the sheep bot-fly, which develop in the sinuses of the head, causing severe inflammation of these parts, nervous symptoms and death. The character of the symptoms of a parasitic disease depends on the habits of the parasite, and the tissue or organ, that it may attack. The parasitic flies belong to the order Diptera, and the families Muscidae and OEstridae.
Fleas belong to the sub-order Pulicidae. The order Hemiptera includes the lice, and the most important families are Pediculidae and Ricinidae. Mites and ticks belong to the order Acarina. The most important parasites belonging to this order are the Sarcoptidae and Ixodidae. OESTRIDAE. The three common bot-flies are the Gastrophilus equi, Hypoderma lineata and OEstrus ovis.
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