. A manual for the study of insects. Insects. INSECTS AND THEIR NEAR RELATIVES. 43 transverse, fine lines, which are so ii 'pressed as to appear Hke the divisions between minute segments (Fig. 52). The majority of mites are very small; but some, as certain Ticks, are of considerable size. With the exception of a single family the members of which bring forth living young, all mi ^s are produced from eggs. As a rule, the newly-hatched mites have only three pairs of legs; but a fourth pair are added during growth. In PkytoptuSj which infests plants, there are only two pairs of legs. The mode of
. A manual for the study of insects. Insects. INSECTS AND THEIR NEAR RELATIVES. 43 transverse, fine lines, which are so ii 'pressed as to appear Hke the divisions between minute segments (Fig. 52). The majority of mites are very small; but some, as certain Ticks, are of considerable size. With the exception of a single family the members of which bring forth living young, all mi ^s are produced from eggs. As a rule, the newly-hatched mites have only three pairs of legs; but a fourth pair are added during growth. In PkytoptuSj which infests plants, there are only two pairs of legs. The mode of life of the different members of this order varies greatly: some are parasitic upon animals; others infest living plants ; and many feed upon dead animal or vegetable matter, thus acting as scavengers. Among the mites that are parasitic upon animals are the various Ticks, which are very common in the warmer parts of our country. Figure 50 rep- resents the Cattle-tick of the Southern States. It should be remembered in this connection that the so-called Sheep-tick is a true insect, Fig. 50. — The belonging to the order Diptera. male. The Itch-mite is a well-known parasite^ infesting man and causing the disease known as the itch. The sensation character- istic of this disease is due to the burrowing of the mites in the skin ; and the efficiency of sulphur oint- ment in checking this disease is due to the fact that by the use of Figure 51 represents an itch-mite. 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 Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. joint author. Ithaca, N. Y. , Comstock Pub. Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
