Key to females of the ligare group

1. 5 setae on genu I and 3 setae on femur IV, 5 setae ps, seta ft on tarsi IV absent..................................... 2

-. 4 setae on genu I and 2 setae on femur IV, 3 setae ps, seta ft on tarsi IV present................... P. f o r m os u s (Figs. 4–6)

2. 5 setae on femur II.................................................................................... 3

-. 4 setae on femur II................................................................ P. chilensis (Figs. 13–15)

3. Coxa setation: 2-1-4-0, all setae situated on coxal fields, except for 3a on intercoxal area, gnatosoma situated apically...... 5

-. Coxa setation: 3-1-4-0, all setae located on coxae I–IV, except for 1a and 3a situated on intercoxal area, gnatosoma displaced on dorsal side......................................................................... P. ovata (Figs. 7–9)