235 



2. Antennae ciiiht-jnintiMl, niarii'ln of ImhIv Ix'set with 

 projecting tnbercnles, bearing a number of stout short 

 spines. Tylococcus Newst. 



3. Antennae eight-jointed. Body usually longer than 

 three times its width. Mentum short. Tarsus half 

 as long as tibia. Trionymus Berg. 



4. Antennae six-jointed. Caudal lobes well developed, 

 each bearing a clutinoiis tooth or hook. Adult female 

 enclosed in a brittle powdery white sac. 



Geocorciis Green. 



5. Antennae six-jointed. Adult female secreting much 

 white meal or cotton. Caudal lobes not conspicu- 

 Q^ig^ Ripersia Sign. 



E. Adult female active. Dorsum thickly covered wdth tine 

 hair, appearing glassy. Caudal lobes as in Pseudococcus 

 with slender setae. Antennae seven- jointed (many indi- 

 viduals show only six joints). Derm with rows of large 

 round ]-)ores on each segment, forming groups at margin. 

 Anal ring with six hairs. Nesococcus n. g. 



Synopsis of Species. 



Genus AsteroJecmilum Targ. 



Ovisac of female broadly oval. Margin with well-developed 

 frino'e. bambusae Boisd. 



Ovisac of female much narrower, decidedly elongate, cari- 

 nated in the middle, attenuated at caudal end of body. In- 

 festing bamboo. miUaris Boisd. 



Ovisac of female circular, usually depressed in the bark of 

 phmts, marginal fringe well developed. Infesting oleander, 

 lig and many other plants. pustulans Ckll. 



Genus Eriococcus Targ. 



Adult female yellowish brown, enclosed in a closely felted 

 white sac. Antennae and legs well developed. Anal ring with 

 ejorht hairs. Infesting Araucaria species. amucariae Mask. 



