Morphology of all the developmental stages of Neogreenia osmanthus (Yang & Hu) (Hemiptera: Coccomorpha), and transfer of the genera Neogreenia MacGillivray and Jansenus Foldi to the family Qinococcidae.

All the developmental stages of Neogreenia osmanthus (Yang & Hu 1994) are described and illustrated (first- and second-instar nymphs, third-instar male and female nymphs, pupa and adult male), and the adult female is redescribed and re-illustrated. A key to all the developmental stages is provided and a brief biology of N. osmanthus is given. The relationship between the genus Neogreenia MacGillivray and Qinococcus Wu is discussed. Neogreenia (in the family Kuwaniidae) and the genus Jansenus Foldi (in the family Xylococcidae) are transferred to the family Qinococcidae, and the diagnosis of Qinococcidae is revised.