Almost every animal and bird is subject to these parasites.
The common fowl, duck, goose, game birds of all kinds, and pigeons, are very commonly infested by them, as are also the dog, the cat, the sheep, and the guinea-pig.
The two principal families of the Mallophaga are the Philopteridæ and the Liotheidæ.
Fig. 61.—Lipeurus Diomedeæ (Mag.)
Tribe VIII.—Thysanura or Bristle Tails.
The forms composed in this tribe of insects are reckoned at present to be the nearest resemblance to the theoretical progenitors of the insects; in fact, Sir John Lubbock hints that they might well be regarded not as insects at all, but rather as the surviving representatives of a group formed by the ancestors of the whole multitude of insect types.
Fig. 62.—Lepisma Saccharina (Mag.)
