Key to adult females of species of Hemiberlesia known from China

1 Perivulvar pores present................................................................................ 2

- Perivulvar pores absent................................................................................. 4

2(1) Antenna with 2 long setae and 4 short spines..................................................... H. cyanophylli

- Antenna with 1 long seta and 2 short, stout processes......................................................... 3

3(2) Median lobe semicircular with single slight notch on outer margin; plates slender, not longer than median lobe; with 2 setae present between median lobes.................................................................... H. lataniae

- Median lobe with outer and inner margins each with 1 deep notch; plates longer than median lobe; without any setae between median lobes.................................................................................. H. palmae

4(1) Antenna with 2 long setae; each pygidial lobe with 1 strong seta at its base......................... H. chipponsanensis

- Antenna with 1 long seta; without setae at base of pygidial lobes................................................ 5

5(4) Median lobe almost semicircular, with 1 slight notch on outer margin only........................................ 6

- Median lobe with both outer and inner margins with 1 deep notch............................................... 7

6(5) Plates fimbriate; antenna with 4 short, stout processes in addition to 1 long seta.............................. H. rapax

- Plates simple; antenna with 1 spine in addition to 1 long seta..................................... H. serrulata sp. n.

7(5) With 2 macroducts present between median lobes.................................................... H. sinensis

- Without any macroducts between median lobes.............................................................. 8

8(7) Plates branched, almost as long as median lobe; first paraphysis attached to base of median lobe slender..... H. massonianae

- Plates unbranched, obviously shorter than median lobe; first paraphysis attached to base of median lobe robust...................................................................................................... H. pitysophila