CONTENTS 
No, 1, July, 1921 
{Issued October 31, 1921.] 
PERKINS, GRANVILLE A. The expression of the octet theory of va- 
lence::in: structural formulas 2. bic e  edntn 
One plate. 
LicHt, S. F. Notes on Philippine termites, II..............-..-..-------------- 
Six plates and three text figures. 
Starr, O. A new species of Vincentia from the Philippines................---- 
Weis, A. H. The preparation of tikitiki extract for the treatment 
yl Pitre RN acacia kde pean poets ronleneninins ceases 
Rouwer, 8. A. The Philippine wasps of the subfamilies Scoliine 
and Elidine 
REINKING, OTTo A. Higher Basidiomycetes from the Philippines 
and their hosts, V............----::-0:-sssseccscscsceesesnesenenscscetnenenereennesscnesnenanenecees 
McLean, F, T. The permeability of citrus leaves to water................ 
One text figure. 
REVIEWS 
No. 2, August, 1921 
[Issued December 9, 1921.) 
Lee, H. ATHERTON. Citrus-canker control: a progress report of 
experiments ¢ 
Two plates. 
ScHEERER, OTTo. Kalinga texts from the Balbalasang-Ginaang group 
One text figure. 
WILEMAN, A. E. Notes on Japanese Lepidoptera and their larvae: 
Part VI sels 
Two colored plates. g 
SMITH, WARREN D. Ancient cave dwellers of Batwaan, Masbate, 
Philippine Islands. 
Five plates and two text figures. 
WHARTON, LAWRENCE D. Opisthorchis wardi, a new species of liver 
fluke from the cat in the Philippine Islands 
One plate. 
Licut, S. F. Notes on Philippine Alcyonaria, Part VI: New Philip- 
pine Pennatularia (sea pens) of the genus Lituaria.........-- . 
iil 
. Page. 
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