* 
ILLUSTRATIONS 
PLATE 1 
Map of the Philippine Islands, showing the commercial forests (green) 
Fig. 1. 
Pigs s 
Brown 
FG. 1: 
Pig, 7: 
and the division of the Archipelago into zoégeographic sub- 
provinces (red). 
PLATE 2 
Bancoran Island, in Sulu Sea, as seen at low tide. The trees belong 
to a species of Pisonia. (Photograph by Cortes.) 
- Bancoran Island, Sulu Sea, at high tide. (Photograph by Cortes.) 
. Maeander Reef, Sulu Sea. (Photograph by Cortes.) 
PLATE 3 
Hundreds of brown boobies, Sula leucogastra (Boddaert), on Usong 
Island, Tubbataha Reef, Sulu Sea. (Photograph by Worcester 
and Cortes.) 
-. A colony of sooty terns, Sterna fuscata Linnzus, with young, on 
Maeander Reef, Sulu Sea. There are a few brown boobies in 
this colony. (Photograph by Worcester and Cortes.) 
PLATE 4 
and white boobies on Usong Island, Tubbataha Reef, Sulu Sea. 
(Photograph by Worcester and Cortes.) 
PLATE 5 
Monument marking the boundary between Rizal and Bulacan Prov- 
inces, Luzon, erected in 1858; kilometer 18, Manila-North Road. 
(Half-tone etching loaned by the Bureau of Public Works.) 
. Typical roadside vegetation in Bulacan Province, Luzon; kilometer 
23, Manila-North Road. (Half-tone etching loaned by the Bu- 
reau of Public Works.) 
PLATE 6 
A typical road in Tayabas Province, Luzon, on the Manila-South 
Road. In a coconut region. (Half-tone etching loaned by the 
Bureau of Public Works.) 
. Typical cultivated vegetation in Cavite Province, Luzon. (Half- 
tone etching loaned by the Bureau of Public Works.) 
PLATE 7 
A flight of locusts near Pasay, Luzon. (Photograph by Cortes.) 
. A clump of bamboo near Pasay, partly defoliated by locusts. (Pho- 
tograph by Cortes.) 
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