Fig. 39—Head of house-fly showing eyes, antennæ and mouth-parts.
Fig. 40—Proboscis of house-fly, side view.
Fig. 41—Lobes at end of proboscis of house-fly showing corrugated ridges.
Fig. 42—Wing of house-fly.
Fig. 39—Head of house-fly showing eyes, antennæ and mouth-parts.
Fig. 40—Proboscis of house-fly, side view.
Fig. 41—Lobes at end of proboscis of house-fly showing corrugated ridges.
Fig. 42—Wing of house-fly.