Identifying insects from photographs is notoriously difficult. While it is not so difficult to identify the genus, when it comes to the species, it very often requires an expert in his/her particular field to examine a specimen under a microscope to be one hundred percent sure that it is correctly identified.
Since I am a photographer and not a biologist, I do my best by asking experts for their advice, and therefore cannot guarantee that every insect is correctly identified.
My thanks go to the moderators at Natura Mediterraneo Forum who kindly identified the subjects of most of these photos.