182 PSEUDOCOCCUS ACERIS. 



Fig. 4. Anal lobe and anal orifice of the adult 



female. X 140. 



Fig. 5. Eye of the adult female. X 140. 

 Fig. 6. Male. X 25. 

 Fig. 7. Antenna of the male. X 140. 

 Fig. 8. Genital armature of the male (dorsal). 



X 140. 



Fig. 8 a. The same (semi-profile). X 140. 

 Fig. 9. Marginal spine of the larva, with waxen 

 plates radiating from the base. Highly magnified. 



GENUS BIPERSIA * (Signoret). 



External characters of the adult females resembling 

 those of Dactylopius. Antennas of six joints, or rarely 

 of five or seven. Anal lobes normally very small or 

 rudimentary, but in the aberrant species, R. terrestrial, 

 Newst., and E. halophila, Hardy, these organs are 

 abnormally large. Legs persistent. Habits chiefly 

 subterranean. 



Males unknown. 



Male puparium felted. 



All the species are more or less mealy, and many 

 have marginal appendages, but they are usually very 

 short, and, as a rule, are only present at or towards the 

 anal extremity. Both Cockerell's R.fimbriatula and his 

 E. salm,onacea have a fringe of cottony tassels all round 

 the body ; but the most abnormal species in this 

 respect is E. filicicola, Newst. (PL LXVII, figs. 1, 9). 

 In its early stage this insect very closely resembles 

 Dactylopius citri, but at the period of parturition it 

 becomes stationary, and then secretes, from the margins 

 of its body, bundles of extremely long and exceedingly 

 delicate iridescent filaments, which, when examined 

 under the microscope, appear very much like spun 

 glass. A few species are known to construct more or 



* See Appendix. 



