J32 THE COCCIDAE 



plates only slightly longer than median pair of lobes; median 

 pair of lobes not adjacent, quadrangular, entire; second pair 

 of lobes incised, lobelets small, lateral lobelet twice or more 

 as large as mesal; third pair of lobes incised, loblets subequal, 

 smaller than lateral lobelets of second pair; anus located 

 slightly caudad of vulva; mesospiracerores 3, metaspiracerores 



2; genacerores 15-17(23-30)10-16. Italy on Tamarix 



etrusca Leon. 



SPECIES OF DUPLACHIONASPIS 

 a. Pygidium with second pair of lobes not incised. 



b. Pygidium with median pair of lobes distinctly divergent. 



c. Pygidium with each median pair of lobes twice as broad as 

 second lobe, caudal portion expanded, malleiform, appearing 

 notched on middle of mesal margin, entire; second pair of 

 lobes simple, promient, narrow, bluntly pointed, entire; 

 plates well developed, plates arranged so far as shown, none in 

 median incisura, one in second, one cephalad of each second 

 lobe, another about as far cephalad as distance between two 

 caudal plates; anus located cephalad of vulva; dorsal oracera- 

 tubae arranged in conspicuous rows; genacerores 6-8(11-17)17- 



20. Australia on Callistemon Candida Green. 



cc. Pygidium with each median lobe distinctly narrower than sec- 

 ond lobe; median pair of lobes strongly divergent, twice as 

 long as wide, mesal and lateral margins subparallel, distal 

 end bluntly rounded, entire, proximal ends distant; second pair 

 of lobes large, truncately rounded, as long as median pair; 

 plates longer than lobes, arranged 0, 2, 5-6, those of each lateris 

 arranged 3-lor2-l, described plates of each second incisura 

 probably a latadentis; genacerores 7-8(14-19)11-14. Chionaspis 

 berlesii Leon. (Lindgr.) Canary Islands on Plocama, Micro- 



meria, Ruta, Salsola, Cneorum, Cytisus canariensis Lindgr. 



bb. Pygidium with median pair of lobes quadrangular, not divergent. 

 c. Pygidium with median and second pair of lobes distinct. 

 d. Pygidium with median pair of lobes crenulate at distal end. 

 e. Pygidium with genacerores arranged 6-10(8-12)10-14; 

 median pair of lobes subquadrate, short, conspicuous be- 

 cause of their dark color, distal end crenulate; second 

 pair of lobes indicated as short rounded structures, trian- 

 gular; plates long and spine-like, arranged 0, 1, 2, those 

 of each lateris distant; anus distant from caudal margin; 

 submarginal region with transverse elongate groups of 

 oraceratubae ; second nymphal female with median pair 

 of lobes large, quadrate, distant; lateres strongly serrate; 



plates long and spine-like. Natal on Capparis 



retigera Ckll. 



ee. Pygidium with genacerores arranged 1-7(8-13)23-30; 

 median pair of lobes quadrangular, mesal and lateral 

 margins straight, caudal end irregularly and coarsely ser- 



