European Saddleback Bushcricket - Ephippiger ephippiger
What you see in these photos are a male (top) and a female (bottom) of Ephippiger ephippiger (Orthoptera - Tettigoniidae), a katydid species native to Europe and parts of Asia.
Like other bushcrickets this species is characterized by extremely long antennae, a pronotum resembling a saddle, thick abdomen and vestigial wings. Females have a highly developed ovipositor, the organ used for oviposition (as seen in the bottom picture).
In this species the mating behavior includes the so called nuptial gifts or nuptial feeding, in which males secrete from their accessory glands a gelatinous mass that does not contain sperm called a “spermatophylax”, attached to the spermatophore that contains the sperm. At the end of copulation, females consume the spermatophylax who then go on to eat the remainder of the spermatophore.
Photo credits: [Top: ©Michel Maylin | Locality: Pernes-les-Fontaines, Provence-Alpes.Cote d’Azur, France, 2012] - [Bottom: ©Bernard Dupont (CC BY-NC-SA 2.0) | Locality: Les Rives, Hérault, France, 2004]