Insect Food Habit Ratios on Quelpart Island

The following notes represent an attempt to reduce the activities of the insects on Quelpart Island to certain food-habit types and to express the relative importance of these types in terms of parts of the whole, thus establishing a series of ratios. A list of the insects of this island was published recently by Hanjiro Okamoto as Volume 1, No. 2, Bulletin of the AgriculturaI Experiment Station, Government-General of Chosen, Suigen, Corea, Japan, March, 1924, and the species in this list were arranged and tabulated in accordance with the Dredominating larval habits of their families. According to Mr. Okamoto, Quelpart Island is the most southern point in Corea, being the largest island adjacent to that part of the mainland. Its total area is given as about 718 square miles. The highest point is Mr. Kanra with an elevation of 2056 m., and the island consists mainly of tertiary volcanic peaks surrounding Mt. Kanra with a gradual slope to the sea. Mr. Okamoto quotes Dr. Nakai concerning the native plants which number about 1300 species and it is possible to separate the island into seven zones, "of which the southern limit of each is much higher in elevation than the northern, except at the top, where no relation exists with respect to the ocean current, and the seventh zone is consequently level on all sides." The flora of the four lower zones is temperate while a more northern flora is found in the three upper ones. The island therefore has a flora of a wide range. A more detailed description of the area can be found in Mr. Okamoto’s paper. Some 527 species are listed and although this figure does not represent a "complete count," from the information given as to the routes and times of the collecting trips, it does appear as if it might be considered as a representative sample. Even