224 FORMICIDJE. 



//. Upper margin uf node on 1st joint of 

 pedicel entire, not eniarginate. 

 a'\ Lateral lobes of bead punctate .. . F. )iaorojii,]).2ol. 

 6'. liRteral lobes of bead reticulate. 

 «". .Vbdouien opaque, finely striate 



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



/>'■. Abdomen not opaque, only striate 

 at base. 

 a'. Second node distinctly more 

 tban twice as broad as long. 

 a'*. Head, tborax and abdomen i p. 235. 



yellowisb red I\ latinoda, 



b''. Head, tborax and iibdomen [p. 236. 



black or very dark brown , . P. anyustior, 

 b~. Second node of pedicel longer, 

 less tban twice as broad as 

 long. 

 (f. Head distinctly longer tban [p. 234. 



broad P. fei-f/usoni, 



b"*. Head square, as broad as [p. 235. 



long P. hvogwerfi, 



b. First joint of pedicel witli no projection or 

 appendix beneath. 

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

 vexity, transverse mesonotal furrow obsolete, 

 «-. Head onh' as broad as long. 



fp. Posterior half of bead smooth and [p. 242. 



shining P. megacephala, 



h\ Posterior half of head sculptured, not 

 smooth. 

 a'-. Occipital lobes longitudinally striate. 



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



6*. Occipital lobes reticulate. Length 



under 3 mm P. sar/ei, p. 243. 



b-. Head distinctly longer than broad. 

 «•'. Occiput smooth and shining. 



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



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

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



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

 b^. Occiput more or less sculptured, 

 fl'. Length over (3 mm. 



«'. Second node of pedicel with the [p. 238. 



sides produced into cones P. phijjsoni, 



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



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

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



a^. Head anteriorly beneath bidentate . P. tvatsoni, 

 //. Head anteriorly beneath not dentate, 

 a". Frontal grooves for reception of 



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



b'. Frontal grooves for reception of 

 scapes of antennoe present. 

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



shining P. tetnplaria, 



b'. Thorax reticulate and opaque, 



not shining P. parva, p. 244. 



