146 THE ORCHID REVIEW. [May, 1913- 
mentioned soil; good yellow fibrous loam, a little cow dung, osmunda 
fibre, and sphagnum moss. Use pots two sizes larger than the ones 
previously occupied by the plants, for Cymbidiums are strong growers, and 
do not like frequent root disturbance. 
Any Orchids which are in need of fresh surface soil, without removing 
enough to disturb the roots below, may be top-dressed, using a large 
proportion of sphagnum moss. 
SUGGESTED ADDITION. 
ODONTOGLOSSUM PESCATOREI.—A very suitable species for an amateur’s: 
collection. It bears some likeness to the universally popular O. crispum, 
but the flowers are smaller, and are borne in great quantity on long 
branching spikes, frequently sixty or more blossoms being produced. The 
sepals and petals are white, and the disc of the lip yellow crested with a 
few purple spots. It continues long in perfection, and may be procured at 
a very reasonable figure. It was originally known as O. nobile. The 
variety Sandere is unique and beautiful. 
ORCHIDS IN ANT’S NESTS. 
A very interesting note on some Tobago Orchids which grow in ant’s 
nests has been sent by Mr. W. E. Broadway, of the Botanic Station, 
Tobago. It is an extract from a letter by Mr. G. H. Sander, who is 
stationed at Trafalgar, in the central and cool part of the island. In 
sending a couple of plants of Epidendrum fulgens Mr. Sander remarks: 
“The species is getting scarce round here. It is usually found on the tops 
of very big trees growing in the bottoms of wet valleys, so that without 
clearings they are not easy to obtain. Also they are always on an ant’s 
nest in the same manner as Coryanthes speciosa and Epidendrum 
xanthinum. I wonder why these three are almost invariably on ant’s 
nests and the majority of the rest of Tobago Orchids usually free? On the 
tree where I obtained this E. fulgens there was a mass of Ornithidium 
confertum quite free from ants, also a big clump of Catasetum tridentatum, 
and yet E. fulgens was alive with them.” 
A similar fact was recorded by Im Thurn with respect to two 
Epidendrums which grow in the Eldorado Swamp, Mount Roraima. 
He remarks that they, ‘‘ unlike any of the others, are invariably associated 
with ants, either because these creatures prefer to make their nests in the 
roots of the plants, or because the seeds of the plants find their most 
suitable nidus and germinate in the ant’s nests.” One of these species is 
called E. Schomburgkii, Lindl., but a comparison of the dried specimen 
shows it to belong to what Lindley called E. Schomburgkii var. confluens, 
which is identical with E. fulgens, Brongn. The other is called E- 
elongatum, Jacq., though a note explains that it is a species having the 
