THE ORCHID REVIEW. 183 
peculiar to this section of Dendrobiums, but there is no reason for much 
anxiety, as the plants continue to grow and form strong pseudobulbs. 
Red spider may, perhaps, prove troublesome among the Dendrobiums 
just now. Where traces of this pest are found—and it may be detected by 
the leaves assuming a sickly whitish appearance—the plants should be 
sponged frequently with clear soft water, or a weak solution of insecticide ; 
but on no account should the young and tender foliage be syringed with 
insecticides, or great injury may ensue. 
Catasetums and Chysis must now be placed with the Dendrobiums, and 
suspended, as they are now making their growth. They are plants which 
quickly deteriorate if the roots are not kept in a sweet condition. It is best, 
therefore, to re-basket them at least once in every two years. The flower 
spikes appear from the base of the new growth of the former, when that is 
about half matured, and, if the plants are very strong, sometimes a second 
spike will also push out. They are extremely curious and interesting 
Orchids, and deserving of good culture. One great point is to keep them 
quite free from thrips ; but be careful to use nothing but tobacco powder, 
as liquid insecticides, even if very weak, will speedily ruin the new growths. 
Mormodes I prefer to grow with the Mexican Orchids in a warm and sunny 
position. These are also very remarkable Orchids, and otherwise require 
exactly the same treatment as the foregoing. 
If the roots of Cattleyas should become clubbed—which is cauised by the 
larva of the Cattleya fly—the clubbed portion should be cut off and 
destroyed, for if the insect is allowed to breed, the nuisance may become 
serious. 
ORCHID PORTRAITS. 
ANGRZCUM SESQUIPEDALE.—Gard. Mag., May 18, p. 294, with fig. 
BATEMANIA PERUVIANA, Rolfe.—Gard. Chron., May 4, p- 551, fig. 77- 
CATTLEYA CITRINA.—Journ. of Hort., May 9, p- 399) fig. 67. This is 
C. citrina aurantiaca. 
CATTLEYA GIGAS FRANCONVILLENSIS.—Orchid Album, t. 505. 
CaTTLeyA x Harpyana.—Gard. World, May 11, p. 585, with fig. 
CATTLEYA X HARDYANA VAR. LINDENI.—Lindenia, t. 468. 
C@LOGYNE PANDURATA.—Journ. of Hort., May 2, p- 377; fig. 63. 
CYPRIPEDIUM CHARLESWORTHII.—Bot. Mag., t- 7416 ; Orchid Album, 
t. 508. 
CYPRIPEDIUM X CONCO-LAWRE eOnchdd Album, t. 506. 
CyprRipEDIUM GODEFROY LEUCOCHILUM.—Journ. of Hort., May 16, 
P- 423, fig. ve & 
CypripepIuM X OLENUs.—Gard. Chron., May 18, p- 613, fig. 86. 
DENDROBIUM IMPERATRIX, Kranzl.—Reichenbachia, pt. 12, Pp. II, t. 95. 
