CONTENTS 
No. 1, July, 1921 
[Issued October 31, 1921.] 
Page. 
Perkins, Granville A. The expression of the octet theory of va- 
lence in structural formulas 1 
One plate. 
Light, S. F. Notes on Philippine termites, II — 23 
Six plates and three text figures. 
Stapf, O. A new species of Vincentia from the Philippines 65 
Wells, A. H. The preparation of tikitiki extract for the treatment 
of beriberi 67 
Rohwer, S. A. The Philippine wasps of the subfamilies Scoliinse 
and Elidinse 75 
Reinking, Otto A. Higher Basidiomycetes from the Philippines 
and their hosts, V . 91 
McLean, F. T. The permeability of citrus leaves to water 115 
One text figure. 
Reviews 127 
No. 2, August, 1921 
[Issued December 9, 1921.] 
Lee, H. Atherton. Citrus-canker control: a progress report of 
experiments 129 
Two plates. 
Scheerer, Otto. Kalinga texts from the Balbalasang-Ginaang group 175 
One text figure. 
Wileman, A. E. Notes on Japanese Lepidoptera and their larvae: 
Part VI..._ 209 
Two colored plates. 
Smith, Warren D. Ancient cave dwellers of Batwaan, Masbate, 
Philippine Islands 233 
Five plates and two text figures. 
Wharton, Lawrence D. Opisthorchis wardi, a new species of liver 
fluke from the cat in the Philippine Islands 243 
One plate. 
Light, S. F. Notes on Philippine Alcyonaria, Part VI: New Philip- 
pine Pennatularia (sea pens) of the genus Lituaria 247 
iii 
