Aphelinus abdominalis
around, curls up the wing tips, and will try to pierce the aphid in the abdomen with her long ovipositor. The ovipositor will remain inserted for several [...] important role in reducing pest numbers, with the adult wasp piercing the aphid with her ovipositor, and sucking it empty without laying an egg. The small aphids [...] for host feeding while the larger individuals are parasitized. The control of the aphids is due to host feeding and parasitization in roughly equal measure