. Insects affecting domestic animals [microform] : an account of the species of importance in North America, with mention of related forms occurring on other animals. Parasites; Insects, Injurious and beneficial; Animaux domestiques; Insectes nuisibles. rudimentary condition of the circulation and respiration. Only one species need be mentioned here. Litiguatiila rhivaria I'ilger. The worm-like condition of this ])arasit(' may be inferred from the fact that it was originally described as a tapeworm (Tiviita rhinaria)j but its Arachnid allinitics were early suspected, and with tlie de- terminat
. Insects affecting domestic animals [microform] : an account of the species of importance in North America, with mention of related forms occurring on other animals. Parasites; Insects, Injurious and beneficial; Animaux domestiques; Insectes nuisibles. rudimentary condition of the circulation and respiration. Only one species need be mentioned here. Litiguatiila rhivaria I'ilger. The worm-like condition of this ])arasit(' may be inferred from the fact that it was originally described as a tapeworm (Tiviita rhinaria)j but its Arachnid allinitics were early suspected, and with tlie de- termination of the early stages were proven beyond questi()n. In the adult worm-like stage it is a parasite in the nasal cavities of various animals, especially car- nivores, tlie most common host, perhaps, being the dog. Tlie larval state occurs in the viscera of different animals, but more particularly those which are herbivorous—the horse, sheep, ox, goat, and many others—as well as man. The migrations between these hosts, which are evidently an es- sential part of its existence, may be stated in brief to be the discharge of numerous eggs in the nasal cavitites of the dog or other host, which, in sneezing or coughing, spreads them over vegetation that latei' is taken as food by some herbivorous animal, and following this ingestion the embryos escai)e into the glands and viscera of the new host, occupying especially the mesenteric glands, liver, etc., wheve they remain in an inactive condition until fragments of the viscera containing them rt^\^\\^I^\\IliY^VTmvryw '"'*^ eaten by a carnivore, when SlV' '* '^'M\VPrrrrwTcrwv<:<;VS^^^ they gain access to the nasal cavities and become mature. In case they have not the for- tune to be eaten by a carnivore, it is believed tlie^^ may migrate within the body of their herbivore host, reencyst themselves in other organs, and even in S(mie cases reach the nasal cavities by way of the lungs and air passages, thus accounting lor the
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashi, bookyear1896
