92 
Psyche 
[April 
INSECT FOOD HABIT RATIOS ON QUELPART 
ISLAND 1 
By Harry B. Weiss. 
New Brunswick, N. J. 
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 Okamotoas Volume 1, No. 2, Bulletin of the Agricultural 
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 predominating 
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 Mt. 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 
Tormer papers on the ratios of insect food habits were published in the 
Ohio Journal of Science, vol. xxiv, pp. 100-106, Entomological News, vol. 
xxxv, pp. 362-364 and the Proceedings of the Biological Society of Washington, 
vol. 38, pp, 1-4. 
