New genus, Aplanusiella , and two new species of leafhoppers from southwestern United States (Homoptera: Cicadellidae: Deltocephalinae)

A new genus, Aplanusiella (type-species, Aplanusiella utahensis , n. sp.) and two new species, A. utahensis and A. californiensis , are described and illustrated. The two species are allopatric and coexist on the same host genus ( Atriplex ) with members of a closely allied leafhopper genus, Aplanus . Notes on distribution of hosts and leafhoppers as well as leafhopper intergenetic relationships are also given.