Aphis is a genus of insects in the family Aphididae containing at least 600 species of aphids. It includes many notorious agricultural pests, such as the soybean aphid Aphis glycines. Many species of Aphis, such as A. coreopsidis and A. fabae, are myrmecophiles, forming close associations with ants.

Selected Species: 

• Aphis affinis
• Aphis asclepiadis — milkweed aphid
• Aphis craccae — tufted vetch aphid
• Aphis craccivora — cowpea aphid
• Aphis fabae — black bean aphid
• Aphis genistae
• Aphis gossypii — cotton aphid
• Aphis glycines — soybean aphid
• Aphis helianthi — sunflower aphid
• Aphis nerii — oleander aphid
• Aphis pomi — apple aphid
• Aphis rubicola — small raspberry aphid
• Aphis rumicis - black aphid
• Aphis spiraecola — spirea aphid (syn. Aphis citricola — citrus aphid)
• Aphis valerianae — black valerian aphid