VIII 



Dr. J. P. Kleiweg de Zwaan, Mr. P. E. Muolenburgii, 

 Mr. F. K. VAN Dedem, Dr. A. J. Salm ; 



from Borneo, by Dr. H. A. LORENTZ; 



from Java, by Prof. Max Weber, Mr. J. HuYSMANS, Mr. 

 E. JACOBSON, Dr. Dan. de Lange, Dr. P. Buitendijk, Mr. 

 H. A. Wolff, Mr. W. C. van Heurn; 



from the Lesser Sunda Islands, by Prof. MAX Weber, the 

 late Dr. G. A. J. van der Sande ; 



from Celebes, by Prof. Max Weber, Mr. A. C. Kruyt, Mr. 

 E. C. AbendanoN; 



from the Moluccas, by Dr. L. F. DE Beaufort, Mr. F. K. 

 VAN Dedem ; 



from Waigen, by Dr. L. F. DE BEAUFORT; 



from Ntiv Guinea, by 6 different Dutch New Guinea Expe- 

 ditions between the years IQ03 — 1912; 



from different small groups of islands, by the Siboga Expe- 

 dition. Moreover I could dispose of the specimens, belonging 

 to the collections of the Royal Zoological Society „Natura 

 Artis Magistra" of Amsterdam. 



Other species, not represented in the Amsterdam Museum, 

 could be examined, partly by visiting other Museums, partly 

 by loan. I wish to express my sincere thanks to Dr. VAN 

 LiDTH DE Jeude of the Leyden Museum, to Prof. ROULE and 

 to Dr. Despax of the Paris Museum, to Dr. BoULENGER of 

 the British Museum, who were kind enough to allow me to 

 study the interesting and often rare forms in the collections 

 of these Museums, and I am also greatly indebted to Dr. 

 Annandale of the Indian Museum at Calcutta, Dr. Stern- 

 FELD of the Senckenberg Museum at Francfort and Dr. 

 Baumann of the Bern Museum, who were so good as to send 

 specimens for examination. 



I had the great advantage to obtain the help of the well 

 known artist Mr. J. F. Obbes, which has enabled me to give 

 a figure of nearly every genus treated in the following pages. 



Finally I am glad of having an opportunity to thank Prof- 

 Max Weber for his valuable advice and kind help concerning 

 a great many questions. 



Amsterdam, February 191 5. 



Nelly de Rooy. 



