CADASTRAL SURVEY (F. cadastre, from It. catastro, from low Lat. capitastrum, °a register for a poll-tax"; Lat. caput, °the head"), a territorial survey in which objects are represented in their true relative positions and magnitudes. A cadastral survey differs from a topographical one, in not magnifying the principal objects. It requires consequently to be made on a larger scale than the topo graphical survey, so as to admit of a proportion ally accurate representation of towns, houses, roads, rivers, etc. The scale on which the cadas tral map of the United Kingdom is prepared, irgiv 0 of the linear measure of the surface sur veyed, is an example of the scale of a cadastral survey. This scale corresponds with 25.34 inches to the mile. See SURVEYING.
the common name of any of the order Trichoptera, a group of aquatic insects, related to and by many supposed to be the ancestors of the moths and butterflies (Lepidoptera). They resemble the lower moths, but the wings are not scaled, except in a very rudimentary way. They differ from moths in having no true °tongue" or well-developed maxilla adapted for sucking the nectar of flow ers, but as in moths the mandibles are either absent or obsolete. About 150 species are thus far known to live 'n North America. The larvae are called acaddis-worms," °case-worms," or °cad-bait." They are more or less cylindrical, with well-developed thoracic feet, and a par of feet on the end of the abdomen, varying in length. The head is small, and like that of a tortricid larva, which the caddis-worm greatly resembles, not only in form, but in its habit of rolling up submerged leaves. They also con
struct cases of bits of sticks, sawdust or grains of sand, which they drag over the bottom of quiet pools, retreating within when disturbed. They live on vegetable matter and on water fleas (Entomostraca) and small aquatic larva. When about to pupate they close -up the mouth of the case with a rating, or, as in the case of Helicopsyche, which is coiled like a snail shell, by a dense silken lid with a single slit, and in some instances spin a slight, thin, silken cocoon, within which the pupa state is passed. The pupa is much like that of the smaller moths, except that the mandibles are present, and wings and limbs are free from the body. After leaving its case it makes its way over the surface of the water to the shore, some times going a long distance. The female de posits her eggs in a double gelatinous, greenish moss, which is attached to the surface of some aquatic plant. Consult McLachlan, 'Mono graph of the Trichoptera of the European Fauna); Banks, (A List, Synopsis, Catalogue, N and Bibliography of the europteroid Insects of Temperate North America' ; (Transactions of the American Entomological Society,) Vol. XIX; also a paper by Newham and Betten in (Bulletin of the New York State Museum,' 47.