10 



11 



15 



82 



cf femur 2 with long spur and 



little tubercle P. furcatus (G. ét R. Can.). 



cf femur 2 with short spur and 



big tubercle P. eornutus (G. et R. Can.). 



Without mentum P. kempersi Oudms. 



With mentum 10 



Colour pale 11 



Colour brown 12 



cf palp art. 1 ventrally with2spurs P. coleoptratorum (L.). 

 (ƒ palp art. 1 ventrally with 1 spur P. emarginatus (0. L. Koch) 



!(ƒ femur 2 with spur and little 

 tubercle P. longulus (C. L. Koch). 

 cT femur 2 with 2 little tubercles 13 



cf genu 2 with spur directed to- 



ward tibia P. tiberinus (G. Can.). 



13 ! . 



cf genu 2 with spur directed to- 



ward femur P. dentipes (C. L. Koch). 



!9 ventral shield posteriorly fused 

 with dorsal P. calcaratus (C. L. Koch). 

 9 ventral shield free 15 



Epistoma bidentate P. wasmanni Oudms. 



Bpistoma otherwise 16 



Epistoma tridentate (forms with 

 one dorsal shield ; compare with 



above 1 aud 12) P. longulus (C. L. Koch). 



Epistoma quinquedentate . . .17 

 cf horns of hypostome with hori- 

 zontal thora P. canestrinii (Berl.). 



(f horns of hypostome of the usual 

 type 18 



!(ƒ tibia 2 with long spur or other 

 apophysis, directed distally . . P. crassipes (L.). 

 rf 1 tibia 2 otherwise 19 



