98 



the records are of additional interest and value to the student in 

 this group of insects. They are also important from an economic 

 point of view as determining the nature and extent to which the 

 various species confine their attacks to one or more groups of 

 plants. 



At Kew we have discovered up to the present 46 species repre- 

 senting 24 genera, and, as previously stated,* this far surpasses 

 any other record for an equal area in the British Isles, representing, 

 in fact, about one-half of the recorded species for this country. 

 Of this grand total about 74 per cent, are aliens, and have been 

 introduced on imported plants. Of these aliens three have been 

 completely exterminated — formerly there were four— but of these 

 Gymnococcus agavium has apparently been re-introduced since the 

 publication of the first list of these insects. 



Our thanks are due to Mr. G. Nicholson and his colleagues for 

 the care and attention they have given to the collecting of the 

 material. 



Freshly imported plants may often be found to harbour coccids, 

 and a careful search should invariably be made with a view to 

 preventing the introduction of a new pest. 1 shall at all times be 

 pleased to examine any material that may be sent to me. 



The nomenclature of the Coccidae has considerably changed 

 since the publication of the first list, but in order to avoid con- 

 fusion the names given in the previous catalogue have been 

 retained. Any changes in the generic or specific names are given 

 m brackets. 



DIASPINAE. 



Aspidiotus (Chrysomphalus) personatus, Comstock. Male and 

 female pupana. On Tillandna Gr lessen, ana. Coll. K. Kett. This 

 minute species confines its attacks almost exclusivelv to various 

 S, ?•? t , Tt !! a ?teia in this country, but is rare. Outside the 



and British Guiana. 



West 



^!^ 8 ^ hederae / 7 Va \ Male and female PUP*™. On 

 mlTfir 5!^^^ .(House No. 7), and MeseLnjanthe- 

 mum Bolu&u (House No. 5). Coil. C. P. Raffill . 



and n PW t ft +u„ xr r lulolson / -this is an indigenous species, 

 formed u^n ^ f™ *""?* J he Dnile P u P a ™ are inTlKbly 



S^^^sse^^ sL e n im The f r i k t r! e , the 



w e hic e h ™j%^^«™m£z SVoS; 



detect. y re8embles the t*rk, they are most difficult to 



J^^iieya^Adandtae, OrnitJndium coccineum, and Laelia 



*uecei. Information. Additional Serif* V 



