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JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
time of Limiffius down to the present day. It will be a triumph, there- 
fore, when the first individual of that fsex [is discovered. It is also) a 
single -brooded species, and its habits differ in no appreciable way from 
that of its near ally. 
Lecanium hesperidium, Linn. 
A much smaller species than either of the foregoing, and in this 
country is known chiefly as a greenhouse pest, infesting various plants, 
but is very partial to cultivated Eoses under glass. It also occurs in the 
open air upon Ivy and Myrtle, but is a comparatively rare species on such 
plants. It is somewhat oval in form, rather shiny, and is of a dull 
Fig. 105. — Cottony Cushion Scale or the Currant 
(Pulvinaria rihesice) on branch of Currant (nat. size). 
yellowish colour, having a network pattern of dark chestnut or black 
confluent spots. 
Flat Black Lecanium 
[Lecanium perforatum, Newstead). 
A very common coccid infesting Caryota and other Palms and various 
cultivated plants. It can easily be recognised from other species found 
in this country by its pitchy-black colour and its very flat pyriform shape. 
It is probably indigenous to sub-tropical countries, and is common in the 
West Indies. Its specific name is derived from certain curious transparent 
places in the skin which can be seen only under the microscope. 
Cottony Cushion Scale of the Cuerant 
[Pulvinaria rihesice, Signoret). (Fig. 105.) 
All the adult members of this genus are recognised at a glance by the 
remarkable cushion or pad of white wax which the female secretes behind 
