278 THE COCCIDAE 



f. Pygidium with median pair of lobes large; second pair 

 of lobes incised, mesal lobelet with notch on lateral 

 margin; third pair of lobes with mesal lobelet pointed 

 and smaller than lateral; plates arranged 2, 1, 1, 3, 

 always simple, those of median incisura hardly longer 

 than lobes and shorter than other plates; genacerores 



27-27(28-35)31-33. Mexico on Ortica mexicana Ckll. 



ff. Pygidium with median pair of lobes large and promi- 

 nent; second pair of lobes small, incised, two lobelets 

 subequal; third pair of lobes small, deeply incised, 

 mesal lobelet twice as broad as lateral, lateral lobelet 

 bluntly pointed; plates arranged 2, 2, 2, 2, those of me- 

 dian incisura small, shorter than median pair of lobes, 

 other plates long and stout, those of each lateris near 

 third lobe; genacerores 5-5(7-10)7-9. Mexico on Chil- 



opsis. chilopsidis Marl. 



ee. Pygidium with median pair of lobes large, entire or finely 



serrate or slightly crenulate, not notched. 



f. Pygidium with single plate in each second incisura. 



g. Pygidium with genacerores 7-7(12-13)10-11; median 



pair of lobes large, pointed, finely serrate, distant; 



second pair of lobes incised, lobelets bluntly rounded, 



finely serrate, mesal lobelet largest; third pair of 



lobes smaller than second, similar in form, mesal 



lobelet largest; plates arranged 2, 1, 1, 2, those of 



each lateris situated, one near third lobe and other 



slightly beyond middle; second and third incisurae 



prolonged as pointed lobe-like structures bearing Jra- 



ceratubae. South Africa on Macrolobium 



meridionalis Lindgr. 



gg. Pygidium with genacerores 2-2(5-6)3-3; median pair 

 of lobes large, bluntly rounded, oblique, serrate; sec- 

 ond pair of lobes incised, lobelets bluntly rounded, 

 almost entire, mesal lobelet longer and broader than 

 lateral; third pair of lobes larger than usual, 

 smaller than second pair, deeply incised, bluntly 

 rounded, subentire; plates 2, 1, 1, 2, those of each 

 lateris situated one near third lobe and other near 

 cephalic end; median incisura deeply hollowed out, 

 its plates subequal in length to median lobes; second 

 and third incisurae with blunt lobe-like projections 



bearing oraceratubae. South Africa on Crudia 



crudiae Lindgr. 

 ff. Pygidium without plates in median incisura. 



g. Pygidium with median pair of lobes distant, at least 

 not fused at proximal end. 



h. Pygidium with genacerores 9-9(16-18)9-10; median 

 pair of lobes large, entire or slightly crenulate; 

 second pair of lobes incised, mesal lobelet larger 

 than lateral; third pair of lobes broad and very 



