Aphis is a genus of insects in the family Aphididae containing about 400 species of aphids. It includes many notorious agricultural pests, such as the soybean aphid A. glycines. Many Aphis, such as A. coreopsidis, are myrmecophiles, forming close associations with ants. Species include:Aphis craccivora - cowpea aphidAphis fabae - black bean aphidAphis gossypii - cotton aphidAphis glycines - soybean aphidAphis helianthi - sunflower aphidAphis nerii - milkweed aphidAphis pomi - apple aphidAphis r… (More on Aphis)