CONTENTS 
Page. 
MERRILL, ELMER D. Studies on Philippine Rubiaceae, 
IV 425 
FISHER, WILLARD J. Low-sun phenomena in Luzon. 
II. Zenith observations of dawn, Baguio, 1920 487 
OSHIMA, MASAMITSU. Philippine termites collected 
by R. C. McGregor, with descriptions of one new 
genus and nine new species 489 
CHILTON, CHAS. The occurrence in the Philippine Is- 
lands of the fresh-water amphipod Paracalliope flu- 
viatilis (G. M, Thomson).... 513 
CHILTON, CHAS. Niphargus philippensis, a new species 
of amphipod from the underground waters of the 
Philippine Islands. ........ 515 
REVIEW ' 525 
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