294 THE COCCIDAE 



d. Pygidium with two plates in each second incisura; second 

 pair of lobes not incised. 



e. Pygidium with median pair of lobes broader than long, 

 short, bluntly rounded, notched on mesal and lateral mar- 

 gins, distant; second pair of lobes not incised, rounded, 

 faintly serrulate, two rounded lobe-like projections ce- 

 phalad of each second lobe; median and second incisurae 

 each with two plates, each lateris with four or five plates, 

 those of median incisura large, as long as lobes; lateres 



with small serrulations. Australia on Acacia 



convexus Mask. 



ee. Pygidium with median pair of lobes entire, broader than 

 long, distal end truncated with rounded angles, margin 

 finely crenulate, distant; second pair of lobes not incised, 

 bluntly rounded, faintly notched; plates arranged 2, 2, 8, 

 those of incisurae short and stout, shorter than lobes and 

 plates of lateres, plates of each lateris arranged in three 

 groups, three near second lobe, three near middle, two at 

 cephalic end; lateres irregular and serrate. Australia on 

 Acacia. acaciae Mask. 



dd. Pygidium with single plate in each second incisura; median 

 pair of lobes pointed, finely serrate, sides strongly roundly 

 converging; second pair of lobes large, incised, mesal lobe- 

 let twice as large as lateral, distal end subtruncate, margins 

 of lobelets finely serrate; plates arranged 2, 1, 6, those of 

 median incisura minute, not one-half length of median lobe, 

 all others stout and much longer than lobes, those of each 

 lateris arranged, one adjacent to second lobe, two near 

 middle, three at cephalic end; oraceratubae located, one in 

 each second incisura, two between two caudal groups of 

 plates of each lateris and adjacent, three adjacent ones be- 

 tween the two caudal groups of plates. South Africa on 

 Berlinia. chitinosus Lindgr. 



bb. Pygidium without plates between median pair of lobes. 



c. Pygidium with two pairs of rounded, produced, very distinct 

 lobes; median pair of lobes largest, distant; median incisura 

 with short bifid process; plates arranged 0, 1, 4, those of each 

 second incisura long, nearly twice as long as lobe, those of 

 each lateris arranged, one adjacent to second lobe, three equi- 

 distant from each other and caudal one; lateris with obtuse 

 projections; mesal forked organ may be median pair of lobes. 



Brazil on bamboo. 'bam'busicola Ckll. 



cc. Pygidium with median pair of lobes large and broad, adjacent, 

 mesal margin with single notch and lateral with two, distal 

 portion of lobes bluntly rounded; second pair of lobes much 

 smaller than median, incised, entire, each mesal lobelet larger 

 than lateral, adjacent to median lobe; third pair of lobes al- 

 most obsolete; plates arranged 0, 0, 3, those of each lateris 

 very large, distal portions elongate and finely attenuate, one 



