Fig (VI)
3.
Egg of Menopon pallescens (Nitzsch), a bird-louse. Under pressure the operculum has come off, and the ovum is squeezing its way out.
DIPTERA.
Family. HIPPOBOSCIDE. (Horse-flies.) 5. Ornithomyia lagopodis (Sharp).
Grouse-flies. The grouse-fly (Fig. 5) belongs to the same group as the horse-fly and the sheep-tick. The latter, however, has lost its wings, and burrows in the wool of the fleece. Most members of the family to which this grouse-fly belongs live upon birds; they frequent particularly swallows