544 
Philippine Journal of Science 
1919 
GALLS CAUSED BY FSYLLID^ 
Alstonia scholaris R. Br. Apocynacese. 
Leaf galls^^ caused by Pauropsylla tuberculata Crawford. 
Monothalamous ; subcylindrical ; concolorous with leaf, except 
at apex, yellowish; nonpubescent. Apex somewhat deeply cleft. 
Wall thick; succulent. Chamber subcuneate, with the sharp 
edge pointing distad; direction the same as the median depres- 
sion at cleft of apex. Opening apical; subcircular; without 
process ; not visible until the adult psyllids are ready to emerge. 
On the opposite surface of the leaf, a short, conical protuber- 
ance with apex broadly rounded. 
Average length, 4 millimeters; broader diameter at apex, 
3; narrower, 2,5; broader diameter at base, 3.75; narrower, 3. 
On either surface of the leaf; more commonly on nether 
surface. 
Luzon, Laguna, College of Agriculture, Los Banos, at an 
altitude of about 50 meters. May, 1917. Gall No. 18322, Col- 
lege of Agriculture collection. 
These galls are abundant but the adult insects are some- 
what difficult to rear on account of the tendency of the 
leaves to dry in a couple of days after removal from the tree. 
The causal psyllid was first described from Pusa, Bengal, and 
reported as captured on Alstonia and also on “pumpkin.”^® 
The insect has never been recorded from the Philippines before. 
Calophyllum inophyllum L. Guttiferse. 
Leaf galls. Adult psyllids collected but not identified. 
One or both margins of leaf, except at apex and base, nar- 
rowly doubled up inferiorly, the fold forming the chamber 
wherein the insect passes its preimaginal stages. Older leaves 
more deeply concave longitudinally; a slight yellowing at dif- 
ferent places on the folds. 
Average diameter of fold, 2.5 millimeters. 
Luzon, Laguna, School of Forestry, Los Banos, at an alti- 
tude of about 100 meters. March, 1918. Type gall No. 18348, 
College of Agriculture collection. 
” Previously described by Riibsaamen from Bismarck Archipelago in 
Marcellia 4 (1905) 7. Also described and figured by Leeuwen-Reijnvaan 
from Java in Marcellia 9 (1910) 38. Figured by Leeuwen-Reijnvaan in 
Bull. Jard. Bot. Buitenzorg, II 3 (1912) 4. Described by Leeuwen- 
Reijnvaan from Celebes, Bull. Jard. Bot. Buitenzorg II 21 (1916) 24. 
Crawford, Indian Psyllidse, Rec. hid. Mus. 7 (1912) 430. 
