550 Philippine Journal of Science 
gall surface until shortly before emergence of adult. A thin, 
whitish, membranous secondary flap near base of neck. Open- 
ing subcircular; at one end of gall. 
Length of gall, 11.5 millimeters; thickness, 5.75; breadth, 4.5; 
length of chamber, including neck, 9.25; diameter at broadest 
point, 2.5. 
On upper surface of leaf; numerous. 
Luzon, Laguna, Los Bafios Falls, near Los Bafios, at an alti- 
tude of about 50 meters (Baker and Uichanco); Mount Ma- 
quiling, at an altitude of about 150 meters. January, 1917. 
Type gall No. 18308, College of Agriculture collection. 
Fairly common; but adults difficult to breed. 
ERIOPHYID AND MISCELLANEOUS GALLS 
The part of this treatise, involving galls caused by Eriophy- 
idx, is withdrawn for a later paper. Likewise, all other galls of 
which the insects have not been found are omitted here in the 
hope that further work on additional fresh materials, which are 
constantly coming in, may furnish some clue to the identity of 
the causative agents. 
ACKNOWLEDGMENTS 
I wish to express my hearty appreciation of the valuable as- 
sistance given me by Prof. Charles Fuller Baker, acting dean of 
the College of Agriculture, and Prof. Charles S. Banks, chief 
of the department of entomology, under whose joint direction 
the work was conducted. The work was begun under Professor 
Baker while Professor Banks was in America. I am also under 
great obligation to Prof. F. W. Foxworthy and Messrs. Calixto 
Mabesa and Nemesio Catalan, of the department of dendrology 
(forest botany), School of Forestry, for identification of most of 
the botanical material and for their kindly codperation; to Prof. 
E. D. Merrill, botanist of the Bureau of Science, for identification 
of some botanical specimens; to Dr. E. P. Felt, state entomologist, 
Albany, New York, U. 8S. A., for determination of gall midges 
collected from my galls; and to Dr. W. Docters van Leeuwen- 
Reijvaan of Bandoeng, Java, for having very kindly furnished 
me with an almost complete set of his important papers on Dutch 
East Indian galls. 
