1	Body pale yellow, bearing many elongated branched projections. SIPH elongated, with short setae near the tip	Cervaphis quercus
–	Body brown, bearing long and short setae without elongated branched projections. SIPH plump, with long setae	2
2	5-segmented antennae. SIPH not reticulated	3
–	6-segmented antennae. SIPH bearing reticulated only at the base	4
3	Body semi-glossy dark brown in life	Eutrichosiphum pasaniae
–	Body yellow green in life	Eutrichosiphum sinense
4	Abdomen smooth spinulose ventrally	Greenidea nipponica
–	Abdomen intensely spinulous ventrally	5
5	Hind tibia with many transverse ridges	Mollitrichosiphum luchuanum
–	Hind tibia without transverse ridges	6
6	SIPH 0.2-0.3 times as long as BL	Greenidea kuwanai
–	SIPH 0.3-0.4 times as long as BL	7
7	Dorsal setae mainly pointed. Body 1.51-1.72 times as long as body width. On Quercus	Greenidea nigra
–	Dorsal setae mainly bifurcated. Body 1.65-1.89times as long as body width. On Castanopsis	Greenidea prunicola