APRIL, I9I0.] THE ORCHID REVIEW. 107 
Sanderiana are now pushing their new growths, but the grower must not be 
misled by this into giving them too much water at the roots. They should 
have just enough to keep them moving till the bulbs are about half formed, 
when they will push a lot of young roots from the base. Let these get well 
into the compost before increasing the amount of water. They are a very 
shy flowering section of Cattleya, and should have the lightest position at 
the warm end of the Cattleya house. C. citrina will now have its flower 
buds well advanced, and should have copious supplies of water till the 
flowers are off. | We put them into the Cattleya house as soon as the buds 
are seen, but as soon as the flowers are over they are moved into a shady 
part of the Intermediate house, and only given sufficient water to keep the 
pseudobulbs plump till they start into growth. C. Gaskelliana, C. bicolor, 
C. amethystoglossa, C. velutina, C. Leopoldi, and C. granulosa are now 
making new growth, and any that require repotting may be attended to, 
using the compost as recommended in February. C. Dowiana aurea and 
€. x Hardyana require similar treatment to C. gigas, but are not so difficult 
to flower. 
CaTTLEYA FrLy.—Imported Cattleyas should be closely examined on 
arrival for traces of this dreaded pest. If there are any small holes in the 
‘bulbs, denoting that they have had the fly, they should be well washed in a 
solution of insecticide and water, and placed by themselves, quite away from 
any other Cattleya, till they have made one season’s growth, a strict watch 
being kept for any appearance of the fly. An experienced grower will soon tell 
whether any plant has it, but an amateur, or even a grower who has never 
seen this pest, will do well to consult someone who has experienced it, and 
make sure on the subject, for if it once gets a foothold in a collection of 
Cattleyas it will soon ruin the lot. In a young state it is detected by the 
abnormal size of the young growth at the base, which tapers to such a 
‘degree at the top of the growth that it is out of all proportion, showing that 
there is something wrong. If such a growth is cut open there will be found 
‘about two to eight white maggots, which feed upon the inside of the young 
growth, and eventually become flies if allowed to develop, and on emerging 
‘lay their eggs in other plants, and so ruin the lot. The best way to get rid 
of them is to cut off all infested growths as soon as noticed, and fumigate the 
‘house with XL All fumigating compound twice a week till the pest is 
-cleared out. It isa drastic method, but the safest. If prevented from breeding 
-they can be quickly got rid of. 
CypRIPEDIUMs.—C. bellatulum is now coming into flower, and should be 
grown with C. niveum, C. Godefroye and its variety leucochilum in the 
lightest and warmest part of the Cypripedium house. As they go out of 
bloom, those that require it should be repotted, using a compost consisting 
of limestone and good fibrous loam broken into pieces the size of a walnut. 
