Halictus farinosus, commonly known as the Farinose sweat bee, is a species of small solitary bee belonging to the family Halictidae. It is found in various parts of Europe and North America. These bees are characterized by their metallic green or blue coloration and a dense covering of fine hairs, giving them a powdery or farinose appearance. They are important pollinators, particularly for wildflowers and crops.