70 [March, 



It must not be supposed that in all the cases herein given the 

 insects have certainly travelled within the last few years. Yov ex- 

 ample, I incline to the belief that Aspidiotus nerii, or Dactylopius 

 cocotis, amongst others, range naturally over a wide extent of the 

 globe ; the occurrence again of such a species as Diaspis 'pinnulifera 

 in two countries such as Fiji and Demerara, which have scarcely any 

 direct communication, points to its being a native of both. But a 

 good many of the others have undoubtedly travelled in the wake of 

 civilization. 



Aspidiotus aurantii, Maskell, first reported New Zealand, 1878. Occurs in N. 

 America {ComstocTc, 1880), Australia, Syria {Riley, Insect Life, June, 1891), Cyprus 

 (Kew Bulletin, September, 1891), and probably most countries where oranges are 

 grown. The original habitat may be the shores of the Mediterranean. Yery in- 

 jurious. A. hudlceice, Signoret, Europe, 1868. Occurs in New Zealand {MasJcell, 

 1878). A greenhouse species, very closely allied to A. nerii. A. camellice, Boisduval, 

 Europe, 1867. Occurs in N. America {=^ A. rapax, Comstock, 1880) and New 

 Zealand (Maskell, 1878). Common and very injurious, chiefly on Euonymus. A. 

 cydonice, Comstock, N. America, 1880, on quince. Occurs in Samoa, South Pacific, 

 on oranges ; specimens received lately by me. A. destructor, Signoret, Mauritius, 

 1869. Occurs in the Laccadive Islands {MasTcell, 1891) and probably elsewhere. 

 Very destructive to cocoa-nuts. A. epidendri, Bouche, Europe, 18 M. Occurs in 

 New Zealand {Maskell, 1878). A hothouse species. A. nerii, Bouche, Europe, 

 1833. Occurs in N. America {Comstock, 1880), Australia, New Zealand, South Sea 

 Islands, and probably in many other countries. Very common on many plants, 

 "with several varieties. 



Diaspis Boisduvalii, Signoret, Europe, 1868. Occurs in New Zealand {Maskell, 

 1878) and N. America {Comstock, 1883). A greenhouse species. D. pinnulifera, 

 Maskell, Fiji, 1890. Occurs in Demerara, on Croton ; specimens lately received by 

 me. D. ros(B, Sandberg, Europe, 1784. Occurs in N. America {Comstock, 1880), 

 Demerara {Morgan, Ent. Mo. Mag., February, 1890), New Zealand {Maskell, 1878), 

 Australia, Fiji, 1891, on roses. Common and injurious. 



Mytilaspis citricola, Packard, N. America, 1870. Occurs in Fiji {3Iaskell, 

 1890), on oranges. M. Gloverii, Packard, N. America, 1869. Occurs in Australia 

 (Maskell, 1890), on oranges. Probably only a variety of the last species. M. 

 jt7iw««/brwii5, Bouche, Europe, 1851. Occurs in Demerara, on Croton; specimens 

 lately received by me. Mr. Morgan (Ent. Mo. Mag , September, 1890) considers 

 this species as probably identical with M. citricola. M. pomorum, Bouche, Europe, 

 1851 (= Cherm. conchiformis, Grmelin, 1788). Occurs in N. America (Comstock, 

 1880), New Zealand (Maskell, 1878), Australia (French, 1891), and probably many 

 other countries. Yery common and injurious on apples, with varieties on several 

 other trees. 



Chionaspis cilri, Comstock, N. America, 1883. Occurs in New Zealand, rarely, 

 on oranges {Maskell, 1884) ; Australia (Maskell, 1891), on palms. C. aspidistrce, 

 Signoret, Europe, 1868. Occurs in India {Maskell, 1891), on Areca catechu. 



