ASPIDIOTUS BRITANNICUS. 119 



London (Dr. Masters), and the Royal Botanic Gardens, 

 Kew (Nicholson). It also occurs at Kew on Ruscus 

 hypoglossum. 



It was first discovered at the former locality in 

 November, 1896, infesting a holly fence, and occurred 

 in such swarms as to seriously injure the shrubs. 

 Measures were taken to destroy the insects by the 

 application of a paraffin emulsion, which effectually 

 killed the greater number of the insects on the upper 

 surfaces of the leaves ; but nearly all those on the 

 under sides had escaped the application. 



The apparent limited distribution of this insect is 

 very remarkable. In all probability it awaits the 

 hunter in other parts of the British Isles, but all 

 attempts at its discovery elsewhere have so far failed. 



I must here acknowledge my indebtedness to Dr. 

 Maxwell T. Masters, the Editor Gardeners' Chronicle, 

 and Mr. R. McLachlan, for the kindly interest 

 taken in procuring a liberal supply of specimens ; and 

 all the more for adding so interesting a species to our 

 fauna. 



Distribution. Mr. Cockerell informs me he has 

 recently met with it in the United States ; but I doubt 

 if it is indigenous to that country. 



DESCRIPTION OF THE PLATES. 



PL VIII, fig. 8. Puparium of adult female. X 25. 



Fig. 9. 'Puparia of immature female. X 25. 



Fig. 10. Adult female. X 25. 



Fig. 11. Puparium of male. X 25. 



Fig. 12. Insects natural size in situ on holly leaf. 

 PL VII, fig. 3. Pygidiura of adult female. X 250. 

 PL XII, fig. 4. Margin of pygidium of adult female. 

 X 600. 



