238 



Genus Tylococcus ]^e\vst. 



Adult female viviparous, pink or pinkish brown, thickly 

 covered with white powdery secretion, not hiding segmenta- 

 tion. Margin of body beset with long, coarse, white filaments, 

 17 on each side. Derm after treatment shows marginal tu- 

 bercles each with a number of conical spines. Anal ring with 

 six hairs. Antennae as in Pseudococcus. Infesting Pandanus 

 odoratissimus. giffardi n. sp. 



Genus Trionymus Berg. 



Adult female oviparous, of a dark pink color, slightly cov- 

 ered with white powdery secretion, not hiding color nor seg- 

 mentation. Antennae 8- jointed, short and stout. Eggsac 

 longer and broader than body of female. Infesting grasses. 



insularis n. sp. 



Genus Geococcui< Green. 



Adult female oviparous, pale honey yellow, broadly fusi- 

 form, surrounded by whorls of fine, glassy hair. Forms a 

 brittle, powdery white sac. Attacking the roots of trees and 

 plants. radicum Green. 



Genus Ripersia Sign. 



Adult female viviparous, pale reddish brown, thickly cov- 

 ered with white mealy secretion hiding segmentation. Anten- 

 nae six-jointed. Margin of body with thick, white, waxy 

 tufts, which often coalesce. Infesting a variety of palms. 



palmarum n. sp. 



Genus Nesococcus n. g. 



Adult female active. Dorsum thickly covered with fine 

 hair, appearing glassy. Antennae seven-jointed (many indi- 

 viduals show only six joints). Legs short and stout, espe- 

 cially femur. Derm when cleared show^s rows of large round 

 pores on each segment of the body, these forming groups at 

 i.iargin. Oaudal lobes as in Pseudococcus with slender setae. 

 Anal ring with six hairs. 



