XIV, 5 Uichanco: Philippine Plant Galls 5438 
On the upper surface of the leaf; very numerous. 
LUZON, Mount Maquiling, at altitudes of 100 to 500 meters. 
July, 1917. Type gall No. 18341, College of Agriculture col-* 
lection. 
These galls are common during the rainy months, and the 
gall insects are fairly easy to breed out. 
Symphorema luzonicum F.-Vill. Verbenaces. 
Leaf galls caused by Luzonomyia symphoremex Felt. 
Monothalamous; spherical or nearly so; stramineous; cov- 
ered with long, fine, dry, yellowish, nonglandular hairs; more 
densely pilose proximad than distad; sessile, and with base 
more or less sunken into the depression formed in the leaf 
lamina. Wall moderately thick; ligneous; of uniform thickness 
throughout. Chamber conforming with the general shape of 
the gall. Opening at distal end of gall; circular; covered with 
a close-fitting lid, which falls off when the midge emerges. 
Diameter of gall, 1.7 to 2 millimeters. 
Generally on the nether surface of the leaf; occasionally on 
the upper surface. 
LuzON, Laguna, College of Agriculture, Los Bafios, at an 
altitude of about 45 meters; Mount Maquiling, at an altitude 
of 150 to 300 meters. Type gall No. 18315, College of Agri- 
culture collection. ; 
These galls are very common, and the causal midges are 
often easily bred out. From examination of the younger leaves, 
it appears that the galls begin with a puncture on either sur- 
face of the leaf, surrounded by a conspicuous, semitransparent, 
diffused area. As the gall grows, the epidermis of the leaf 
splits open and allows the deformity to continue its development. 
Vernonia lancifolia Merr. Composite. 
Leaf galls caused by Diceromyia vernoniz Felt. 
Polythalamous; gall consists of an abnormal contraction and 
incurving of midrib, with the leaf lamina much wrinkled in- 
feriorly; no abnormal formation of hair or development of 
differential color. Chambers ovoid or ellipsoid; embedded in 
the succulent tissues of the abnormal midrib. Openings irreg- 
ular; situated on concave, upper surface of gall. 
Length of gall, 30 millimeters; thickness, 13. 
LuzON, Mount Maquiling, at altitudes of 200 to 500 meters. 
August, 1917. Type gall No. 18143, College of Agriculture 
collection. 
Galls fairly common. Insects easy to breed out. 
