viii ) 



It was of great interest to have the opportunity of studying 

 a good series of S. American Fossors and their prey, and to 

 recognise how constant were the instincts hitherto recorded 

 mainly from other parts of the world. Thus all the Pom2}ilidae 

 had taken spiders, all the species of Sphex Orthoptera, the 

 Cerceris a beetle, the Astata a bug, etc. The orthopterous prey 

 of the Podium suggested the possibility that its true position lay 

 between Ammophila and Sphex. The most interesting record 

 was that of Monedula adonis, one of the Bembecides, with 

 Hesperid prey, not unnaturally classed as " Microlepido- 

 ptera " by the collector. The specimens were in very bad 

 condition and so could not be determined with certainty, but 

 there was no doubt about the fact that very different species 



