EXPLANATION OF PLATE A. 

 Fig. 1. TACHARDIA LACCA, natural size. (Page 16.) 



In the two lower figures the " lac " is seen in situ 

 attached to the branches where the female insects 

 secreted it. The circular specimen to the right is 

 a cross-section of a similar specimen, showing the 

 hollow branch in the centre, and the radiating pyriform 

 cells or chambers which in life were tenanted by the 

 female insects. 



Fig. 2. CBYPTOCOCCUS FAGI. (Pages 29 and 41.) 



The white patches of felted matter in the crevices of 

 the bark are the ovisacs of the females. It is a very 

 common species, and sometimes the sacs completely 

 cover the bark. It is given here as an illustration of 

 one of the British Coccids not known to be attacked by 

 birds, and very rarely by insect parasites, and is very 

 probably a nauseous species. (For similar insects see 

 also Plates C and E.) 



The illustrations on Plates A, B, C, D, and E are given by the per- 

 mission of the Council of the Roy. Hort. Soc. from the Journal of that 

 Society. 



