Contribution to the knowledge of the Indo-Australian Pseninae (Hymenoptera, Sphecidae)

Part I. Psen Latreille CONTENTS Introduction................... ι Systematics................... 3 Morphology.................. 4 Key to the genera................. 7 Psen Latreille.................. 7 Key to the subgenera of Psen Latreille........... 8 Subgenus Pseneo Malloch.............. 9 Subgenus Psen s. str................ 12 Key to the Indonesian and Philippine species of the subgenus Psen Latr. 14 Subgenus Mimumesa Malloch............. 50 Key to the Indonesian and Philippine species of the subgenus Mimumesa Malloch.................. 52 Doubtful species of Psen.............. 56 Some Pseninae from the Asiatic continent and Ceylon....... 57 Distribution and relationships.............. 62 Biological notes.................. 67 Literature................... 67 Index .................... 69 INTRODUCTION In this paper an attempt is made to give a review of the Pseninae occurring in that part of the Malay Archipelago which is formed by the Indonesian Islands and the Philippines. In the first place it is based on the collections of the Rijksmuseum van Natuurlijke Historie at Leiden, Netherlands, and