Demerara river, and then a narrow-gauge single railway conveys one 
across the nineteen miles of forest to Rockstone, on the Essequibo. 
Rockstone consists of an hotel, in reality used only as a risthouse, 
the stations—railway and police—and a post-office ; some rain shelters 
where the gold diggers sling their hammocks complete the list of 
the buildings, either public or private. When the hotel was first 
opened, about two years ago, the neighbourhood was found so un¬ 
healthy that no one could stay in the place more than a fortnight. 
Since then eucalyptus trees have been planted all round the place, and, 
whether due to their influence or not, the place has improved. It was 
originally thought that, perhaps, people from toWn would come out for 
a change. But the change has been such an unpleasant occasion that 
now one can have the place to oneself, as I actually did, save for those 
who come down the river and sleep here for the night. Entomologi- 
eally this place is ideal. There is a large gallery running all round the 
hotel, with a white roof, and with a good strong lamp many moths 
come to light. In such a situation—namely, on the edge of a river— 
Pyralidac preponderate. Xoctuae, probably, are next, and GeometHdae, 
Spkinyidae, Syntomidae, Xotudontidae come in smaller numbers. The 
number of Sphinyidae taken at light was disappointing. Not more 
than eight or ten specimens were so taken during the whole tour ; but, 
as one of these, Ambiilyx curacies, is a very rare species, one must not 
grumble. This latter, however, was taken at Bartica. The day after 
arrival Colaenis phaerusa w 7 as dashing about just outside the hotel, 
among some second year’s growth, where the forest had been originally 
cleared. After taking a couple or so, with much trouble, I sauntered 
up the railway and came across one of those real tropical sights, 
a regular herd of yellow butterflies, sitting on the white sand which 
forms the ballast for the railway. The first interesting thing was to 
see what species they belonged to, and I was surprised to find that 
they were Apr mm (<'atop&ilia ) s tat ira, and not < atn/isilia seniiiic, as I 
expected them to be. Both on this and subsequent occasions 1 noticed 
one or two C. ary ante amongst them. The next question to be asked 
was what are they doing here all together? 1 answered this that they 
were drinking, or thought they were, as the patch they were on was 
yellowish-coloured, and suggested that either a locomotive had let out 
some dirty water or, what was as likely, that some animal or other 
had done the same thing. On this occasion there was some reason 
why all these individuals should be collected in one spot, but subse¬ 
quently, often after a heavy shower, one would come across a little 
swarm (there is no other word) all settled, and for no apparent reason, 
all huddled together. Continuing the walk up the line, a couple of 
anteaters were seen to suddenly emerge from the forest. 1 stood still 
and awaited them for some time, and from the way they sniffed the 
steel railsl should say that was their first acquaintance with civilisation. 
Lepidoptera along the line out in the sunshine were, as usual, scarce, 
so a turn was made into one of the forest paths, where timber was 
being hauled. Some of the numerous Euptychias immediately became 
visible, and then rain descended, and I crouched down under a macin¬ 
tosh cape that I always carried, and had to remain so for about a 
couple of hours. This put a stop to the first day’s sport. The fol¬ 
lowing day, April 27th, was very fine, and a most enjoyable ramble 
was made. A specimen of Meyaleura pcleus, just drying its wings, 
with the pupa case alongside it, was taken from a mora tree, and there 
