TRIBE DIASPIDINI 337 



SPECIES OF UNACHIONASPIS 



a. Pygidium with median pair of lobes large and distinct. 



b. Pygidium always with less than ten plates on each lateris. 



c. Pygidium with genacerores 2-3(2-3)2-3; median pair of lobes 

 large, projecting, constricted at proximal end, separate; plates 

 arranged 0, 5, those of each lateris arranged 1-1-1-1-1; anus 

 located near middle of length of pygidium; scale of adult fe- 

 male pyriform. South Australia on Eucalyptus 



assimilis Mask. 



cc. Pygidium with genacerores 7-11(10-14)6-9; median pair of 

 lobes large, proximal half of mesal margins parallel, subadja- 

 cent, distal portion diverging, distant, lateral margins oblique, 

 long, crenulate; plates, except one adjacent median lobe, long 

 and dagger-like, arranged 0, 5, those of each lateris arranged 

 1-2-2; lateres with latadentes; setae slender, about as long as 

 median lobes; spiracerores wanting. South Africa on lilac.. _ 



ambigua Brain. 



bb. Pygidium with eleven to fourteen plates on each lateris, arranged 

 3-3-5-8, wanting in median incisura; median pair of lobes large, 

 elongate, crenate on both margins, adjacent at proximal end, di- 

 vergent caudad; each lateris with two shallow notches, one be- 

 tween each two groups of plates; segments of preabdomen and 

 thorax, beginning at caudal end, bear plates on each side, as fol- 

 lows: 9-5-8-4 or more 4 or more, only rudiments; genacerores in 



five groups. Antigua on Heliotrope major Ckll. 



aa. Pygidium with median pair of lobes small and inconspicuous. 



b. Pygidium with six or more large plates; median pair of lobes 

 pointed, triangular, almost invisible, other lobes represented by 

 angular projections, distant, twice width of one of them apart; 

 plates several times length of lobes, large, prominent, arranged 

 0, 7, those of each lateris arranged 1-1-2- (1-1-1), cephalic plate 

 forked; dorsal oraceratubae numerous near caudal margin; anus 

 located between pregenacerores ; genacerores 7-10(12-16)9-15. 



Japan on bamboo colemani Knw. 



bb. Pygidium with two short, stout plates on each lateris, distant 

 from each other and from cephalic plate, smaller than caudal; 

 median pair of lobes small, identified as plates by Brain, short, 

 notched at distal end, broad as long; lateres irregular, with 

 indentations; mesospiracerores 4-5; genacerores 3-5(4-6)4-7. South 

 Africa on Euphorbia globosus Brain. 



SPECIES OF FUNDASPIS 



a. Pygidium with distinct mesal indentation, marking division between 

 two median lobes. 



b. Pygidium with median pair of lobes with distinct lateral notch, 

 otherwise entire, distal end bluntly rounded, each lobe longer than 

 broad; second pair of lobes incised, mesal lobelet with its lateral 

 margin oblique with two notches, more than twice as long as 

 lateral lobelet, lateral lobelet small and inconspicuous, entire or 





