250 THE ORCHID REVIEW. 
for its well being ; but I am now able to say that it is not so, the last named - 
house suiting it admirably. 
In the East Indian house it is best to be watchful just now, as yellow 
thrips are rather troublesome, and will do much damage to the young and 
tender foliage of Aérides, Cypripediums, Phalzenopses, and Vandas, by 
permanently marking it. It is difficult at times to dislodge this pest from 
the axils of the leaves by fumigation, and when so the aid of tobacco 
powder must be resorted to. Ants, again, are often a great nuisance, and 
these are indeed difficult to get rid of. The poison that has from 
time to time been advertised in this jeurnal, is more effectual than 
anything I have yet tried. Ants not only carry scale, &c., from one 
plant to another, but there are some plants from which they extract 
and live upon the sweet juices, and this, it is needless to say, 
quickly prostrates the plants attacked. I have had Phaleenopses quite 
killed by nothing more than ants bleeding them to death. The leaves in 
time turn yellow wherever previously pierced, and this spreads until the whole 
leaf is the same colour, and ultimately falls off. Nor is this the only evil 
that may be laid against them. They are busy creatures, for ever on the 
move, and in those pots which they select to principally locate themselves, 
will soon riddle the compost into small particles, causing early decompo- 
sition of the same. The ant is also very destructive to Orchid seeds just 
inating. Every g must still be given these East Indian 
Orchids, by keeping up sufficient warmth and moisture in the atmosphere, 
avoiding at the same time the possibility of letting the mass of sphagnum 
moss at their base get and keep in a continually soddened state, for if so 
the roots confined beneath will perish. 
The present month is a good one in which to thoroughly overhaul the 
Cool house, and to do as much of the repotting as is possible. Epidendrum 
vitellinum is now almost over, and supposing the flowers are not required for 
some future purpose, it is better now to cut them off, so that the new 
pseudobulbs may have a fair chance of becoming strong. If the leading 
growths are over the sides of the pots, they should have larger ones, other- 
wise a top-dressing is all that is required, for this species is best if disturbed 
but little. Until the autumn arrives they may have a good supply of water 
at the roots. D. Falconeri, which grows best in a cool and shady depart- 
ment, must now be sprayed frequently during the day. D. speciosum is 
also a cool growing species, but, unlike the first named, must be given @ 
Position where it can receive a good deal of light, and would be generally 
better suited in the Cattleya or Mexican house, as do also other species hailing 
from the east coast of Australia, such as D. Kingi g e 
linguiforme, and D. teretifolium. These species of Dendrobiums are not 
easy to re-establish after once having their roots disturbed, and should 
