Sternorrhyncha
A group of superfamilies in the order Hemiptera. They are characterized by lacking an antennal arista, the rostrum is located between the fore coxae and the tarsi consist of 1-2 segments. This group includes the Aleyrodidae, the Aphidoidea, the Coccoidea and the Psylloidea, and at present consists of over 16,000 described species.