62 
numerous Mexican and Central eria rp en require critical revision 
before the limits of the species can be defined. "There is one point in 
connexion with the shape of the que in oe section which does not 
pear to be very generally known. Itis this: when there are two in a 
sheath they are concavo-convex ; when there are three in a tess they 
are biconcavo-convex, the inner face being concave or bi o far 
as the Kew eum goes, all the leaves of the Honduras spe cnet appear 
to be in thre 
Sir Alfred Molonty also sent specimens of the Honduras oak (Quercus 
virens) which, like the pine, descends to the sea coast, and is associated 
with palms and other trees of tropical types. 
Beetle larvae attacking Orchids.—Sir Trevor Lawrence, the President 
of the Royal Horticultural Society, submitted to Kew pseudobulbs of 
Dendrobium Imperatriz attacked b n Mr. WE B: dford 
rer on Entomology at the Forestry branch of the Indian Civil 
Engineering College, has kindly frhiéhed 4 the following report upon 
them :— 
beetle. They show; however, some xd divergens from the og 
[ftis quite impossible t o ‘denify sé larve except when their mode 
of life is such as to exclude any doubts. But it happens that the larve 
of the only two known species of the genus Diazenes, Waterh., live in 
orchids. 
The second species, Diesen dendrobiit, Gahan (Ann, & Mag. Nat. 
Hist., ser. 6, vol. xiii, „ p. 520) is known by four apecimens taken alive 
or even p the genus must necessarily remai Mr cer unless the 
beetle be bred from them. But I should conjecture that, from the 
habitat i the host-plants, it will prove to be distin 
Should Sir Trevor Lawrence be so unlucky as to ed out the beetles. 
in his conservatory, I should be glad to see them and examine them, 
But for the sake of the orchids, I would recommend that they be care- 
fully looked over and the affected stems destroyed. If any plants are 
so attacked as to be not worth saving they might be removed to a house 
which contains no other orchids, and covered with gauze netting so as 
to detain ony beetles which may breed out, if it is desired to rear them 
for ang 
But it go important that by careful supervision no affected ste 
shall be left which will distribute the insect at large in the orchid- honik 
when they have reached the winged stage. It might be possible to 
save pseudobulbs not as yet badly i injured by destroying the enclosed 
