Pt ee Uichanco: Philippine Plant Galls 541 
portion of leaf lamina normal. Chambers formed by infolded 
parts of leaf thickly lined with long pubescence, the latter serving 
as support for the developing midges. Midrib and lateral ner- 
vules abnormally pubescent at nether surface of leaf. Adult 
midges make their exit either at distal or at proximal aperture 
of chambers. 
Length of leaf, including petiole, 25 millimeters; length of 
affected part, about 19; thickness of chamber, from midrib of 
leaf to distal portion, 6. 
Luzon, Laguna, College of Agriculture, Los Banos, at altitudes 
of 45 to 100 meters. October, 1917. Type gall No. 18165, 
College of Agriculture collection. 
Not very common. 
Parashorea plicata Brandis. Dipterocarpacee. 
Leaf galls, probably caused by Tricontarinia luzonensis Felt.** 
Monothalamous; green when young; castaneous when mature; 
glabrous; subconical; base somewhat peripherally incurved, the 
curvature thus formed continuing through the leaf lamina on to 
the other surface of the leaf and forming the more or less 
convex bottom of the gall. Apex generally acute; otherwise 
rounded off. Wall thick; hard and tenacious. Chamber spher- 
ical; inclosed by a moderately thick, ligneous wall. A second- 
ary, inferior, subconical, empty chamber; apparently without 
function. 
Diameter at base, 4.5 to 5 millimeters; height, 4 to 6. 
On nether surface of leaf; often solitary but sometimes ag- 
gregate and fused together. 
LuzON, Mount Maquiling, at altitudes of 50 to 500 meters. 
August, 1917. Type gall No. 18151, College of Agriculture col- 
lection. 
These galls are fairly common. The leaves, as well as the 
galls, dry up very quickly when removed from the tree, thereby 
making it difficult to breed the midges. Further work may 
lead to the discovery of the actual cause of this interesting 
formation. 
Shorea guiso Blume. Dipterocarpacez. 
Leaf galls. Adult midges not collected. 
“This species is believed by Dr. E. P. Felt to be predacious rather 
than phytophagous. See Felt, New Philippine gall midges, Philip. Journ. 
Set. § D 13 (1918) 294. 
