EXPLANATION OF PLATE XXVII. 



CHIONASPIS BICLAVIS. (Page 190.) 

 Fig. 1. Margin of pygidium of adult female. X 600. 



CHIONASPIS SALICIS. (Page 180.) 

 Fig. 2. Margin of pygidium of adult female. X GOO. 



CHIONASPIS ASPIDISTRA. (Page 187.) 

 Fig. 3. Margin of pygidium of adult female, x 600. 



MYTILASPIS PINN^IFORMIS. (Page 20 1 -.) 



Figs. 4 and 6. Margin of pygidium of adult female. 

 X 600. 



MYTILASPIS FOMOBUM. (Page 191.) 

 Fig. 5. Margin of pygidium of adult female. X 600. 



MYTILASPIS FICUS. (Page 202.) 

 Fig. 7. Margin of pygidium of adult female. X 600. 



