TRIBE DIASPIDINI 319 



from caudal margin and about five times from vulva; genacerores 

 5-7(13-14)8-8. New Mexico on Quercus montanus Ckll. 



SPECIES OF DIASPIS 



a. Body of adult female with large, blunt, button-like projection or 

 tubercle on each side on level with rostrum. 



b. Pygidium with an altaceratubae opening in mesal latadentis, with 

 four marginal altaceratubae opening in latadentes on each side 

 and two submarginal altaceratubae; median pair of lobes strong- 

 ly divergent, oblique, proximal ends not fused, finely serrate; 

 second and third pairs of lobes small, short, incised, lateral 

 lobelet usually larger than mesal; plates comparatively long, spine- 

 like, arranged 0, 1, 1, 7, those of each lateris arranged 1-1-1-3-1, 

 cephalic four much broader at proximal end than others; gena- 

 cerores 8-12(6-25)7-20; mesospiracerores about 18, subdivided into 

 groups. Diaspis cattleyae Ckll. Europe, Australia, Hawaiian 

 Islands, America on Acacia, Cattleya, palms, wattle, various hot- 

 house plants. boisduvalii Sign. 



bb. Pygidium not with an altaceratuba opening in mesal latadentis, 

 with five marginal altaceratubae opening in latadentes on each 

 side and two submarginal latadentes, two large adjacent breva- 

 ceratubae located cephalad of median incisura; median pair of 

 lobes subtriangular, unsymmetrical, divergent, mesal margins 

 serrate; second and third pairs of lobes incised, lobelets sub- 

 equal with truncated ends with rounded angles, entire, mesal 

 lobelet slightly larger than lateral; cephalad of each third lobe 

 a lobe-like latadentis and cephalad of this a triangular projection, 

 long oblique side, serrate; plates caudad of serrate projection 

 much shorter and narrower on proximal portion than those 

 cephalad, arranged 0, 1, 1, 7, those of each lateris arrangedl-(l-l)- 

 l-(l-l-l); genacerores 0-8(5-12)4-8. South Africa on Connarum, 



Syzygium. africana Lindgr. 



aa. Body of adult female not with large, blunt, projection on each side 

 on level with rostrum. 



b. Pygidium with median pair of lobes distinctly larger than sec- 

 ond pair of lobes or at least than second lobelet, if incised, 

 c. Pygidium with median pair of lobes entire or at most only 



slightly crenulate, never with mesal margins serrate. 

 d. Pygidium with plates in second and third incisurae. 



e. Pygidium with median and second pairs of lobes wholly 

 entire. 



f. Pygidium with genacerores arranged 9-15(12-23)10-24; 

 median pair of lobes with lateral margins free, mesal 

 and lateral margins entire, not strongly oblique; sec- 

 ond and third pairs of lobes subequal, incised, mesal 

 lobelet always much larger than lateral, lobelets point- 

 ed, rounded, entire; plates short, arranged 0, 1, 1, 8, 

 those on each side of third pair of lobes longest, those 

 on each lateris short and broad at proximal end, all 



