PULVINAHIA FLOCCIFKKA. 75 



Fig. 4. Derails of adult female, showing character 



of derm-cells (dorsal), x 140. 

 Fig. 5. Dermis of adult female with tubular 



spinnerets (ventral). X 600. 



Fig. 6. Normal antenna of adult female. X 140. 

 Fig. 6 a . Abnormal antenna of adult female, x 140. 

 Fig. 7. Leg of the adult female. X 140. 

 Fig. 8. Marginal hairs and stigmatic spines of 



adult female. X 300. 

 Fig. 9. One of the three pairs of dorsal hairs from 



abdomen of adult female. X 300. 

 Fig. 10. Second-stage female. X 10. 



GENUS LECANIUM* (Illiger). 



Adult females (PL LI, fig. 1 ; PL LVI, fig. 1) naked, 

 or rarely faintly farinose, retaining legs and antennae ; 

 form varying from low convex to hemispherical above, 

 becoming hollow beneath at the period of parturition ; 

 dermis with simple glands, reticulations, or polygonal 

 cells. 



Male puparia (PL LII, fig. 11; PL LVI, fig. 10) 

 glassy. 



This genus is the most extensive and widely spread 

 of the whole family of the Coccida3, and has from time 

 to time been expanded almost indefinitely to suit the 

 convenience of various authors in order that they might 

 include in it many aberrant forms. The above dia- 

 gnosis does not, however, embrace any of the charac- 

 teristics of the degenerate exotic species, which have 

 recently been placed in the following newly-erected 

 genera or sub-genera : (1) Akermes (Cockerell), (2) 

 Neolecanium (Parrot), (3) Mallococcus (? Cockerell), 

 (4) Megasaissetia (Cockerell). In all these the charac- 

 teristics of the adult females differ materially from 

 those of the typical Lecanium. 



In the first the antennas are either quite rudimentary 



* Lecanium, which dates from 1835, is, by some authors, considered to be 

 preoccupied by Calypticus, Costa (see Appendix). 



