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yellow to rich orange brown; P. pisum, Ads., seemed more un¬ 
common, and two specimens only were met with at Mackfield. 
Many other species were obtained, but space only admits of 
some of the most characteristic being noticed here. 
I am greatly indebted to Mr. P. W. Jarvis for some of the 
names, and to Mr. E. Smith for access to the Chitty, as well as the 
fine general, collection in the British Museum (Natural History), 
with the aid of which I named the Helicidae and Helicinidae. 
PANAMA. 
March 11th and 12th, 1907. 
On our return voyage the elements offered no obstacle to our 
entrance into Colon, and we at once took the train across the isthmus. 
The energy of our American cousins showed itself on every side. 
They have double-tracked the railway: on every eminence rise 
meat-safe-like barracks to accommodate the 80,000 labourers upon 
the pay-rolls. The French plant, being thought not quite up to date, 
has been replaced by machinery of the newest type and scores of 
locomotives, “steam-shovels,” and the like, just stripped of their 
brass, are rusting by the roadside, a sad monument of wasted money 
and labour. Everywhere new lines are being laid, new roads are 
being formed, and the primaeval forest is being cleared away. Much 
vegetation has been destroyed by pouring paraffin oil on to the 
swamps to kill mosquitos. In short everything is being burned, 
blasted, and dammed. 
Mrs. Longstaff caught sight of a Caiman in the Kio Chagres. How 
turbulent that treacherous stream may on occasion be, was shown 
by a large dredger that lay stranded many feet above the ordinary 
level of the river. 
The huge American hotel at Ancon is pretentious, structurally 
bad, and ill-managed. Wire screens intended to exclude mosquitos 
make the rooms insufferably hot, but are so badly fitted that blue¬ 
bottles—not to say bumble-bees—could easily pass through the 
gaping cracks between the window linings and the screens. 
When driving into the old Spanish city of Panama late in the 
afternoon a large butterfly settled in our buggy and was secured by 
Major Elton; it proved to be the Brassoline, Opsiphanes cassiae, 
Linn. 
At the hottest hour of the af ternoon I climbed the conical hill of 
