The Philippine journal of science. [Vol. 57, no. 1]

ACRIDIIDAE AND TETTIGONIIDAE FROM LUZON
PHILIPPINE ISLANDS
By G. BEY-BIENKO
Of the Institute of Plant Protection, Leningrad
ELEVEN TEXT FIGURES
The present contribution is based on a collection of Orthoptera
made by Mr. N. Ikonnikov, the well-known Russian authority in
Palearctic Acridiidse, in the vicinity of Los Bafios, Luzon, Philippine Islands, during the period from April 5 to May 25, 1917,
and at present deposited in the Zoological Museum of Moscow
University.
The collection contains forty-three species, of which thirtythree belong to the family Acrididae and ten to the family Tettigoniidae; three genera and ten species are new to science, but
this number is not unexpected, since the fauna of the Philippine
Islands seems to be extremely rich in Orthoptera. During
recent years three well-known orthopterists-C. Willemse, M.
Hebard, and H. Karny-have made known from this part of the
Indo-Malayan Region many new genera and species of Orthoptera.
I wish to express my sincere thanks to Dr. C. Willemse for
his advice on some doubtful points, and to Mr. A. Zhelakhovzev,
Zoological Museum of Moscow University, who kindly submitted this collection to me for study.
The types of all new species are deposited in the Zoological
Museum of Moscow University.
ACRIDIIDZE
TETRIGIN.eE
Genus CLEOSTRATUS StAl
CLEOSTRATUS MONOCERU8 Stil.
Seven specimens. This genus contains only two species
known from the Philippine Islands.
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