344 THE COCCIDAE 



0, 1, 3, those of each second incisura small, those of 

 each lateris very large and long, placed at long inter- 

 vals; caudal segment of preabdomen with three 

 plates on each side; dorsal oraceratubae not numer- 

 ous; scale pyriform, broad, varying to nearly circu- 

 lar, light grayish or yellowish. This species may be 

 wrongly associated, placed here because compared 

 with theae and aspidistrae. Philippine Islands on 



Gossypium. townsendi Ck.ll. 



bb. Pygidium with one pair of lobes. 



c. Pygidium with plate adjacent to each median lobe, 

 d. Pygidium with genacerores 19-24(30-38)27-35; median pair 

 of lobes large, prominent, broader than long, crenulate; other 

 pairs of lobes obsolete; plates long and slender on cephalic 

 part of each lateris, short on caudal part, arranged 0, 10-12, 

 those of each lateris arranged l-l-l-2-5or7 ; caudal preabdomi- 

 nal segment with 5-7 plates on each side; altaceratubae five 

 on each side; brevaceratubae two on each fourth and five on 

 each fifth row; mesospiracerores and metaspiracerores pres- 

 ent. Ceylon on Mussaenda, Loranthus, Debregeasia 



mussaendae Green. 



dd. Pygidium with genacerores 3-3(13-13)11-13; median pair of 

 lobes together broader than long, not fused, each with about 

 three notches or crenulations ; plates all long, much longer 

 than median lobes, arranged 0, 4, those of each lateris ar- 

 ranged, one adjacent to a median lobe, one in what would 

 be a third incisura, one near middle of each lateris, and 

 one at its cephalic end; caudal preabdominal segment with 

 two plates on each side; spiracerores wanting; prominent 

 latadentes bearing oraceratubae located on each side between 

 two caudal plates; anus located slightly cephalad of vulva. 

 Brazil. orlando Leon. 



SPECIES OF PHENACASPIS 

 a. Pygidium with three or more pairs of lobes. 



b. Pygidium with second pair of lobes not incised, short, broadly 

 rounded, entire; median pair of lobes prominent, oblique, diverg- 

 ing, not confluent, crenulate; third pair of lobes small, slight 

 extension of margin, rounded, entire; plates large, dagger-shaped, 

 arranged 0, 1, 2, 2, those of each lateris distant, altaceratubae 

 large, five on each side; spiracerores wanting; genacerores 12-12 

 (8-9)14-16. Turkey on Arthrocnemum arthrocnemi Lindgr. 



bb. Pygidium with second pair of lobes always incised. 



c. Pygidium always with plates in each second incisura. 

 d. Pygidium always with plates of lateres arranged in three 

 groups. 



e. Pygidium with one plate in median group of each lateris. 

 f. Pygidium with (25-34) pregenacerores present. 



