50 L. Peringuey.—Note on a [March 30, 
NOTE ON A SUPPOSED NEW ICERYA. 
By L. PERINGUEY. 
(READ 30TH MARCH, 1892.) 
THE genus Icerya was created by Signoset for the reception of a 
coccid infesting the sugar cane at Mauritius, and known there as the 
“ Pou & poche Blanche.” Later on Mr. Maskell, of New Zealand, 
made known another species belonging to that genus to which 
he gave the name of Icerya Purchasi. 
It is apparently the species called here the ‘“ Australian Bug,” 
so well-known for the harm it has done to our orange-orchards, and 
also to the Californian ones. 
I say ‘“‘apparently”’ the species known here, because having lately 
received some live examples of the so-called JLcerya Purchasi from 
California, I was much struck by the difference between the young 
larvae and active females and ours. The antennae of the active 
and presumably fertilized female are considerably longer iu tae 
Californian species, the back is more obtusely conical and the 
“‘ filiéres,” or cirrigerous pores are disposed differently. The 
American species does not reach the size of ours, which, as is but 
too well known to you, reaches, the waxy appendage included of 
course, nearly ten lines, and even one inca. 
I think I can make bold to state that I do not believe the two 
insects to be one and the same species. 
Up to 1890 only two Icerya were known, but a greater interest 
having been taken of late in this group of insects of so difficult a 
study, there is nothing surprising that discoveries of new species 
should have been made, and Messrs. Riley and Howard have made 
known four. 
Now we have besides, Icerya Purchasi (Mask), and Icerya Sacchari 
Sign.) 
1, The Rose Icerya: Jcerya Rosae (R. & H.), found in «the 
United States. _ 
2. The Egyptian Icerya: Icerya Agyptiacum (Dougl.) Said 
to have first appeared upon the Banyan tree—a ficus, 
I suppose—to have spread with marveilous rapidity to 
