224 



b*. Upper margin of node on 1st joint of 



pedicel entire, not emarginate. 

 a 5 . Lateral lobes of head punctate ---- P. naorojh, p.231. 



ft 5 . Lateral lobes of head reticulate. 

 a 6 . Abdomen opaque, finely strata 



from end to end .............. P. sharpi, p. 234. 



b*. Abdomen not opaque, only striate 



at base. 

 a~. Second node distinctly more 



than twice as broad as long. 



a*. Head, thorax and abdomen [p. 235. 



yellowish red ............ P. latinoda, 



b*. Head, thorax and abdomen [p. 236. 



black or very dark brown , . P. angustior, 

 b~. Second node of pedicel longer, 

 less than twice as broad as 



a 8 . Head distinctly longer than [p. 234. 



broad .................. P.fergusoni, 



6 8 . Head square, as broad as [p. 235. 



long .................... P. hoogwerfi, 



b. First joint of pedicel with no projection or 



appendix beneath. 



a'. Pro- and mesonotum forming a single con- 

 vexity, transverse mesonotal furrow obsolete. 

 a 2 . Head only as broad as long. 



a 3 . Posterior half of head smooth and [p. 242. 



shining ............................ P. megacephala, 



b 3 . Posterior half of head sculptured, not 



smooth. 

 a 4 . Occipital lobes longitudinally striate. 



Length over G mm ............... P. sykesi, p. 240. 



6*. Occipital lobes reticulate. Length 



under 3 mm ....................... P. sagei, p. 243. 



b' 2 . Head distinctly longer than broad. 

 a 3 . Occiput smooth and shining. 



a*. Occipital emargination narrow and [p. 239. 



deep, lateral lobes broad and rounded . P. pronotdlis, 

 b 4 . Occipital emargination broad and shal- [p. 241. 



low, lateral lobes narrow and angular. P. wood-masoni, 

 b 3 . Occiput more or less sculptured. 

 a'. Length over 6 mm. 



a 3 . Second node of pedicel with the [p. 238. 



sides produced into cones ........ P. pMpsoni, 



b 5 . Second node of pedicel with the [p. 238. 



sides not produced into cones .... P. hospita, 



b*. Length under 4 mm. [p. 237. 



a 5 . Head anteriorly beneath bidentate v . P. watsoni, 

 b*. Head anteriorly beneath not dentate. 

 a 6 . Frontal grooves for reception of 



scapes of antennae absent ...... P. mus, p. 242. 



b 9 . Frontal grooves for reception of 



scapes of antennae present. 



a 7 . Thorax for the most part smooth, [p. 244. 



shining .................... P. templaria, 



V. Thorax reticulate and opaque, 



not shining ................ P. parva, p. 244. 



