228 THE ENTOMOLOGIST. 



had changed, and the districts, to me, had the appearance of 

 another country, all owing to the presence of the Cryptolmmus 

 beetle that devours the eggs of the scale." Rhyzobiiis ventralis 

 also assists in the control."* 



16. Cercplastes RUBENS (Maskell). — Kept in check by four 

 Chalcid flies. 



17. C. CBRIFERUS (Anderson). — Of no importance. 



18. C. FLORiDENsis (Comstock). — Of no importance ; kept in 

 check by a Chalcid, 



19. Calymmata acuminatum (Signoret). — Always badly para- 

 sitised by spp. of Chalcids.f 



20. C. HESPERiDUM (Liune). — On citrus, apparently now very 

 rare. I have seen one or two oranges from Japan slightly 

 infested. 



21. C. LONGULUM (Douglas).— One of the commonest species, 

 but is kept in check to a certain extent by Rhyzohiiis ventralis, a 

 ladybird. 



22. Eulecanium mori (Signoret). — Of little importance. 



23. Saissetia HEMisPHiERicuM (Siguorct). — Always kept in 

 check by Cryptolcemus and by internal parasites. 



24. S. NIGRUM (Nietner). 



25. S. OLE^ (Bernard). 



26. EucALYMNATus TEssELLATUM (Signoret). 



27. E. PERFORATUM (Newstcad). 

 These last four are of little importance. 



Sub-fam. Diaspin^. 



28. Chrysomphalus aurantii (Maskell). — Imported from 

 Japan, but kept in check by the ladybird PiaUjnaspis nigra. 



29. AspiDioTus cYDONiiE, Comstock. [=:^ grecnii] . — Of little 

 importance ; there is a well-marked variety — tecta, Maskell — 

 apparently found so far only in these Islands. 



30. A. PERSEARUM, Cockerell. — Of no importance. 



31. A. PERNiciosus, Comstock. — This pest, so terrible on the 

 mainland, is of no importance here, the conditions being appa- 

 rently unsuitable. I have seen a few examples on imported 

 Californian fruit. 



32. A. siMiLLiMUS, var. translucens, Fernald. — Of no im- 

 portance. 



33. A. rapax, Comstock. — Prof. Koebele notes that it was for- 

 merly in such numbers on apple, pear, and peach trees imported 

 from America, that some of the trees had died. Not now seen. 



31. A. HEDER^ (Vallot). — I have no recent information of this. 

 35. MoRGANELLA MASKELLi (Cockercll). — Of 110 importance. 



''•'- Prof. Koebele mentions two other species of Pulvinaria, but they are 

 unnamed, and I have no further information. 



f Coccus is used for this by Mrs. Fernald (2), but applies properly to 

 cacti, Linne. 



