320 THE COCCIDAE 



distant; oraceratubae of lataceratubae located in lata- 

 dentes; brevaceratubae small and numerous; anus lo- 

 cated nearly midway between vulva and caudal margin, 

 nearer vulva; mesospiracerores about 6. — Diaspis 

 echinocacti Bouche, Diaspis echinocacti cacti Comst., 

 Diaspis echinocacti opuntiae Ckll. — Europe, northern 

 Africa, India, eastern United States, New Mexico, 

 Arizona, Mexico, West Indies, Brazil on Opuntia, 

 Echinocactus, Cereus. calyptroides Costa. 



ff. Pygidium with genacerores arranged 11-11(10-10)3-4; 

 median pair of lobes close together, low, evenly round- 

 ed, entire; second and third pairs of lobes represented 

 by extremely small, colorless, pointed prominences; 

 plates large, two on each side especially large and 

 broad with fimbriated ends, pectinae; anus distant from 

 vulva; latadentes bearing oraceratubae at proximal 

 ends of lobes, closely adjacent pair beneath median pair 

 of lobes, and three or four other pairs at intervals along 

 margin. — Mexico on mistletoe phoradendri Ckll. 



ee. Pygidium with lateral margin of median pair of lobes 

 and margin of mesal lobelet of second pair serrate; me- 

 dian pair of lobes with mesal margins straight, entire, 

 lateral margins feebly rounded, oblique, only small por- 

 tion free, finely serrate; second pair of lobes incised, 

 mesal lobelet broader than long, strongly rounded, very 

 finely serrate, lateral lobelet elongate, rounded, rudimen- 

 tary; third pair of lobes incised, mesal lobelet large, 

 unsymmetrical, straight inner and oblique outer mar- 

 gins, lateral lobelet similar, small, rudimentary; plates 

 of second and third incisurae only slightly longer 

 than lobes, others larger, arranged 0, 1, 1, 6, those of each 

 lateris arranged 1-2-3, distal portion of plates suddenly 

 reduced in size; genacerores 10-20(14-19)8-9. — Syria on 

 Pistacia. syriaca Lindgr. 



dd. Pygidium with furcapectinae in second and third incisurae; 

 median pair of lobes wide apart, large, mesal margins oblique, 

 entire or slightly crenulate, lateral margins only partly 

 free; second pair of lobes incised, short; third pair of lobes 

 incised; latadentis cephalad of each second and third lobe 

 and two caudad of third lobe; plates and pectinae arranged 

 0, 1, 1, 22, those of each lateris arranged 2-3 and others 

 uniformly distributed cone-like plates, furcapectinae adja- 

 cent to each third lobe and about twenty plates cephalad of fur- 

 capectinae; caudal segment of preabdomen with twenty-two 

 plates on each side; oraceratubae numerous; mesospira- 

 cerores and metaspiracerores 20-25; genacerores 15-28(17-45) 

 17-32. — Brazil on Myrtaceae aiistralis Hemp. 



cc. Pygidium with median pair of lobes with mesal margins serrate. 



d. Pygidium with second pair of lobes not incised. 



