ASPIDIOTUS ALIENUS. 



Ill 



wall in six pairs, the central, third, and fourth pairs 

 being less than half the length of the others. Margin 

 between the last club-shaped thickening and the long 

 marginal hair beyond it highly and broadly chitinised, 



FIG. 13. 



FIG. 13. Aspidiotus alienus, pygidinm of adult, ?. X 250. 

 FIG. 14. Margin of pygidium. X GOO. 



the inner margin being denned by a series of gland- 

 like markings. Dorsal tubular spinnerets in a single 

 series, about seven in number, arising between the 

 fourth and fifth club-shaped thickenings ; and there is 



