120 THE ORCHID REVIEW. 
was a well-built structure, and the means of ventilation perfect. Yet the 
plants failed to make any progress whatever, although several expensive 
alterations and additions were made. After continued perseverance the 
remedy was found, and success followed. pAlase 
_ At this time of year the foliage of Orchids is more likely to get scorched 
than at any other, and special attention should therefore be given to the 
shading. In the East Indian ‘house, immediately the sun has sufficient 
power to raise the temperature six or seven degrees, the blinds should be 
lowered. In this house, where so many distinct species are grown, it is 
difficult to attend to the requirements of each separate species as regards 
shading, but a little selection simplifies matters considerably. Such plants 
as Dendrobiums, Catasetums, Mormodes, Diacrium bicornutum, Thunias, 
etc., should be placed in the lightest positions, while Cypripediums, Phale- 
nopses, Aérides, Cirrhopetalums, Bulbophyllums, and the evergreen Calanthes, 
do best on the shady side. 
The occupants of the Cattleya house will not require shading quite 99 
soon as the warmer-growing species, but when the sun is bright it will then 
be necessary. With the Mexican inmates it is quite different, as they 
thoroughly enjoy the increased sunlight, and if the ventilation is properly 
attended to, the plants will only require to be thinly shaded during the 
middle of the day. Odontoglossums, Masdevallias, and other occupants 
the cool house, should be shaded almost as soon as the strong sunlight 
touches the foliage. Very little or no fire-heat will now be required in this 
division, except on very cold or frosty nights, but in the warmer houses 
enough must be maintained to keep up the prescribed temperatures: 
_ A continual warfare must be kept up against all destructive insects, a 
with the increased sun-heat they will multiply rapidly. Now is the time of 
year to prevent them from obtaining a foot-hold amongst the plants, and 
exterminate them if possible. Black .and yellow thrips are exceedingly 
troublesome insects, and every means should be employed to effect thelt 
destruction. An effectual remedy that I have found to check their progress 
is slight and frequent fumigations. One evening of each week is set apatt 
for this operation. No plant is watered on this day, and no damping dest 
allowed after mid-day, as the plants suffer less from the smoke when se 
is dry. Where these insects abound, it is advisable to fumigate ? 
evening of one day and morning of the next, or on two consecutive evenllg® 
After fumigation the plants will require a thorough watering, and the ae 
Staging, etc., should be well damped down. ‘The plants should - 
examined for thrips’ eggs, which the smoke will not kill. These @™ 
be got rid of by sponging the leaves with some weak insecticide. . 
following day the plants should be more heavily shaded than a 
leaves are more liable to be damaged by the sunlight after fumigat 
dipping. 
