. Nature-study; a manual for teachers and students. Nature study. 204 NATURE-STUDY slender rods, as can l3C very nicely seen in the long-legged crane-flies. The large compound eyes of the fly are very prominent and his sight is good. Try to catch a fly. The mouth is very complicated in structure — varying in different kinds of flies and the other genera of the order. In the house-fly the mandibles and maxiike are aborted, but the lower lip is a curious, extensible organ, called a tongue or proboscis. It is usually folded up under the head, but when in use it is thrust out and opens up into two
. Nature-study; a manual for teachers and students. Nature study. 204 NATURE-STUDY slender rods, as can l3C very nicely seen in the long-legged crane-flies. The large compound eyes of the fly are very prominent and his sight is good. Try to catch a fly. The mouth is very complicated in structure — varying in different kinds of flies and the other genera of the order. In the house-fly the mandibles and maxiike are aborted, but the lower lip is a curious, extensible organ, called a tongue or proboscis. It is usually folded up under the head, but when in use it is thrust out and opens up into two lobes, which are. Fic. 6^1. Honuy-bees: Drnne, Queen, and Worker. rough, li]^e a file or rasp. With this rough tongue the fly can scrape off bits of meat, bread, etc., and lap up liquids. Place a little dry and liquid food for some flies to cat, and observe the use they make of their tongues. There are many species of flies. The most common is our house-fly, but there arc meat-flies, bluebottle-flies, fruit- flies, horse-flies, deer-flies, etc. Some of these have mouth- ])arts adapted to piercing and sucking, as in the case of the last two. Adult winged insects do not grow and moult the skin. Hence the small flies we see arc not young house-flies, but belong to another, smaller species. The house-fly is an immigrant from Europe, probably. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons
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