. Annual report of the North Carolina Agricultural Experiment Station. DOMESTIC ANIMALS. 139 is the greatest folly and cruelty to allow worm-infested dogs toroam at liberty, sowing the seeds of painful and destructive diseasesfor such a useful animal as the sheep, to say nothing of the verylarge part which dogs play in infesting children and others withtape worms. B.—Insect Parasites. The dog and cat, more especially the former, are notoriously in-fested by fleas. The fleas form a very closely related group ofsmall, wingless insects, which most entomologists regard as degradedDiptera or flies.
. Annual report of the North Carolina Agricultural Experiment Station. DOMESTIC ANIMALS. 139 is the greatest folly and cruelty to allow worm-infested dogs toroam at liberty, sowing the seeds of painful and destructive diseasesfor such a useful animal as the sheep, to say nothing of the verylarge part which dogs play in infesting children and others withtape worms. B.—Insect Parasites. The dog and cat, more especially the former, are notoriously in-fested by fleas. The fleas form a very closely related group ofsmall, wingless insects, which most entomologists regard as degradedDiptera or flies. Others set apart a special order for them—theSiphonaptera. Insects of this order are small, nearly or entirely wingless, andparasitic. Their mouth-parts are formed for piercing and sucking. The metamorphosis is complete. Thelarval form of fleas resemble a small,blunt sewing needle, but is more or lessbristly. It lives in the dirt, in cracks andcrevices of buildings, kennels, &c, Thename is formed from two Greek words—Siphon, a tube, and apteros, the dog- flea—Pulex serraticeps. Fig. 28.—Human flea. (Pulex irri-tans). Male—magnified. The common flea of the dog is Pulexserraticeps. It is rather larger than the fleaof humans (Fig. 28). This is a wingless, reddish, spiny insect,from \ to tV inch long. The head is bluntand rounded in front and fringed with 7 to 9blunt spines on each side. The hind border ofthe segment, next behind the head, is alsofringed with 7 to 9 similar blunt spines. Thisflea is very common on puppies, nursing do^sand those kept in confinement, without specialattention to cleanliness. It is also the mostI common flea on house cats. It attacks humans Fig. 29.—Head of dog flea. , ?? -i p. , (Puiex serraticeps). Magni- at times, and often causes great annoyance infled 30 diameters. houses where unwashed dogs or cats are al- lowed liberty. Several species of destructive tape worms have thedog flea as their alternate host. Treatment: The ke
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectagriculture, bookyear
