122 THE ORCHID REVIEW. (APRIL, 1906, 
Mr. Stewart also sends a painting of another seedling flowered last year, 
under the name of Mrs. Robert Stewart. It is a cross between O. X 
Adriane and O,. crispum Jeanette, and thus is a form of O. x Fascinator, 
which may be called var. Mrs. Robert Stewart. It has broad, cream-white 
segments, slightly flushed with rose, and blotched with red-brown, most of 
the blotches being near the centre of the segments and thus forming an 
irregular zone. It bears a strong resemblance to a fine form of O. X 
Adriane. 
ORCHID BEETLES. 
THE Coleopterous parasites of Orchids are not numerous, and although they 
have been known for many years they are none the less dangerous enemies. 
All are of exotic origin. 
The one first described was a Longicorn beetle, Diaxenes Dendrobii, 
found about 1894 in houses containing Dendrobium nobile, with which it 
had been imported. Its relatively large size renders its capture easy, in 
spite of its nocturnal habits. It has not been seen in houses now for several 
years, and is a rarity in Entomological collections. 
Xyleborus morigerus belongs to the Bostrichides or wood-borers, and 
though much smaller in size than the Diaxenes, it is much more dangerous: 
It was found for the first time in London on some Dendrobium Phalznopsis 
imported from New Guinea, and was described in 1894 by Mr. Blandford. 
At Marseilles, in 1896, I found examples of the same species. The 
specimens which I sent to Dr. Chobaut, of Avignon, were the object of am 
" interesting study, from which I have taken the following information. The 
female attacks the pseudobulbs, making a tunnel perpendicular to the ane 
She lays her eggs in the centre of the pseudobulbs and then dies, sealing 
up the tunnel with her corpse. The imprisoned grubs hollow out a sort of 
small chamber, the walls of which become blackened ; in this chamber they 
change to the chrysalis stage, and from it they emerge when reaching the 
perfect state. “The male’and fémale are so dissimilar that at first one may 
easily mistake them for two distinct species. The female is reddish brows 
and 1°3 millimetres in length. he male is of a yellowish colour, and only. 
0°6 millimetres in length. The generations of this insect succeed one 
another with such rapidity that it can do considerable damage. Moreovel 
as I have noticed at Marseilles, it does not hesitate, if need arises, to attack 
the pseudobulbs of Lelias and Cattleyas. A plan i des 
for destroying this insect is to eject carbon disulphide with a hypodermie 
syringe into the tunnels hollowed out by it. This delicate method does 
not give very good results, and in my opinion the best method is to cut 
away the affected pseudobulbs. 
In 1898, some Phalzenopsis imported by M. Langlassé brought with 
rec 
ee ee en ae me 
