![Image](http://i1175.photobucket.com/albums/r623/DM1067/JulyAug2012/WWBHlaying-1.jpg)
She was on the right larval host plant, she crawled about testing likely spots....then, she would arch her abdomen as if to lay an egg but nothing emerged.
This happened on four successive occasions as I followed her round.
Does anyone have any ideas as to what this might be due to?