Redescription of the Genus Petalolyma scott 1882,and Three New Species From China (Homoptera:Psyllidae)

In the present paper the old genus Petalolyma Scott 1882 (Type species:Psylla basalis Walker) is discussed and redescribed,and two species of Trichochermes (hyalina and bicolor Kuwayana,1910) and one species of Trioza (divisa Crawford,1917) have been referred to as new combinations.In addition to these,three another species from China are described for the first time,the type specimens of the new species are deposited in the Insect Collections of Beijing Agricultural University.