6 THE COCCIDAE 



er than broad, entire, lateral margin oblique; plates much 

 longer than lobes, arranged 0, 1-2, 1-2, 4-5, those of each 

 lateris in two groups, arranged 1 to 2, 3; dorsal oraceratubae 

 numerous, arranged in rows; genacerores 7-12(18-24)15-17. 



South Africa on Stanotophrum stanotophri Cooley. 



bb. Pygidium always with less than two plates in each second in- 

 cisura; each lateris with plates arranged in two groups, 

 c. Pygidium with one plate in each second incisura. 

 d. Pygidium with median pair of lobes not adjacent at proximal 

 end. 



e. Pygidium with median pair of lobes as broad as long, 

 broadly truncately rounded, entire, separated by distance 

 equal to about one-fourth width of median lobe; second 

 and third pairs of lobes incised, mesal lobelets largest, 

 lobelets about as broad as long, broadly rounded, entire; 

 latadentes in second and third incisurae; plates one-fourth 

 longer than lobes, arranged 0, 1, 1, 4-7, those of each lat- 

 eris arranged l-l-lor2-lor3 ; dorsal oraceratubae not 

 numerous; anus located slightly cepahlad of vulva; gena- 

 cerores 7-13(12-21)14-19. United States, Canada on Pinus, 

 Pseudotsuga, Abies, Torreya pinifoliae Fitch. 



ee. Pygidium with median pair of lobes distinctly longer than 

 broad. 



f. Pygidium with median pair of lobes subquadrangular, 

 mesal and lateral margins subparallel, distal ends 

 bluntly pointed at middle with mesal portion minutely 

 serrate and lateral portion notched; second and third' 

 pairs of lobes incised, mesal lobelet slightly larger than 

 lateral, entire, bluntly pointed; plates long, arranged 

 0, 1, 1, 7, those of each lateris arranged 1-1-5; lateres 

 notched, each with four latadentes bearing oraceratubae; 

 dorsal oraceratubae arranged in rows; anus its own 

 width cephalad of vulva; genacerores 12-19(35-40)27-35. 

 Ceylon on Polygonum polygoni Cooley. 



ff. Pygidium with median pair of lobes triangular or coni- 

 cal, mesal and lateral margins convergent caudad and 

 pointed. 



g. Pygidium with seven altaceratubae on each side; 

 lobes crowded onto subtruncate caudal portion; 

 median pair of lobes pointed, distant, not oblique; 

 second and third pairs of lobes incised, lobelets sub- 

 equal, pointed, nearly as large as median pair of 

 lobes; plates stout, arranged 0, 1, 1, 6-7, those of 

 each lateris arranged l-l-4or5, plates between lobes 

 much shorter and smaller than others; genacerores 

 15-25(18-37)14-22; mesospiracerores crowded groups; 

 anus superimposed over vulva or slightly caudad. 

 Ceylon on Vitis, Elaeagnus, Loranthus vitis Green. 



