THE ORCHID REVIEW. 281 
great drawback to their well-doing is the constant attacks of small yellow 
thrips. These destructive insects are not often discernible, except with a 
magnifying glass, and then sometimes not until considerable damage has 
been done. The best remedial measure against these pests is to puff a 
little tobacco powder or Scotch snuff into the centre of the young growths 
occasionally, which will check their propagation. Immediately the plants 
commence to grow, they should be placed where they can have abundance of 
heat and moisture, and when well rooted copious supplies of water may be 
given until the flowers fade, when a drier and cooler situation is desirable. 
By this time plants of Lelia purpurata will have fairly started into 
growth, and their young breaks will be commencing to emit fresh roots. 
No time should be lost in giving those which require it a shift into larger- 
sized pots, in which operation sufficient space should be allowed for two or 
three seasons’ growth, so that they may not be disturbed again for some 
considerable time. If the plants are in good health and the pot full of 
roots, it is better to break the old pot, picking out as much of the soil as 
possible without causing injury to the roots, than to turn the plants out in 
the usual way. The same materials will suit this plant as advised for 
Cattleya Trianz, on page 121. 
The best-varieties of Cattleya Eldorado, not forgetting the pure white 
variety with orange-yellow throat, named C. Eldorado Wallisii, are certainly 
very desirable Orchids. These will now, in many collections, be in bloom, 
and remain in beauty for a period of four or five weeks. All of them have 
a more or less powerful and agreeable perfume, which adds greatly to their 
charms. These Cattleyas may be grown in pans suspended near the roof 
glass of the Mexican house, choosing a position where they may obtain all 
the light possible. The best time for re-potting is immediately the flowers 
are faded, as the newly-made growths send out from their base a number 
of fresh roots, which readily enter and appreciate the new compost. After 
Te-potting only enough water must be given to entice the young roots to 
grow and prevent the old ones from perishing. 
Last month I gave some hints on potting Masdevallias. As soon as these 
are finished, the Odontoglossums of the crispum, Pescatorei, triumphans, 
and gloriosum types may be taken in hand, as no doubt the beginning of 
September is the best time of the year for potting cool house Orchids. 
Many of the young breaks will be fast sending out their roots, which, having 
fresh material to grow in, become well established before winter Commences; 
Pot the plants moderately firm, keeping the base of the bulbs just above 
the rim of the pot. When completed, prick in a few heads of living 
sphagnum moss over the surface, which, when growing freely, is very bene- 
ficial to the health of the plant. The exceptionally hot and dry weather 
during the past summer has been very trying to the health of cool Orchids 
§enerally, and favourable to the production of small yellow thrips, which, 
