388 ENTOMOLOGICAL NEWS. [Oct., ’08 
streams of light are thrown from the reflectors on the wooded mountain 
sides half a mile distant. The results have been astonishing. ~The 
moths, drawn by the brilliancy, come fluttering in thousands along 
the broad rays of light, until near the reflectors, when tiie exhaust 
fans, with powerful currents of air, swirl them down into the receptacle. 
On the first night three tons of moths were caught. It has been de- 
cided to build another trap on the Rathhaus tower, and the fight with 
the moths will be continued. 
The forests of central Europe have from time to time been ravaged 
by moths from Russia, whose larvae denude the trees of thcir foliage. 
The splendid pines of the Lausitz Mountains are this year threat- 
ened with destruction —Newspaper. 
Dr. C. L. Marvartr, Bureau of Entomology, United States Department 
of Agriculture, Washington, D. C 
Dear Dr. Marvarr: A little over two weeks ago there was a very 
marked migration of butterflies that took place in this vicinity, Miami, 
Fla., in early June. For a week or two from daylight to dark the air 
was full of butterflies,* resembling closely the cabbage butterfly, flying 
south. ‘They usually flew fairly close to the ground, rarely ascending 
higher than the tops of the trees, mostly keeping within ten feet of the 
ground. The belt extended from the shore westward to the ever- 
glades, and possibly out into the everglades, which were dry at the 
time, but they were present in the greatest numbers within half a mile 
of the shore. Apparently the same migration was noticed about 200 
miles north of here along the Indian River, and on a trip I made to 
Key West at the time, I found that the butterflies were present in 
great numbers on the line of Keys extending south and southwest 
from the east coast of Florida. They were still keeping up their 
southerly flight on Key Largo. However, only a few were seen as 
far south as Knight’s Key, the terminus of the railroad, and these, in- 
stead of continuing out over the water, seemed to be flying around on 
land in a more or less confused manner. At the time the swarm was 
about the greatest Mr. Fawcett (my scientific assistant) made observa- 
tions on the number passing and found that in a space one rod wide 
300 passed on the average in five minutes, making about 120,000 an 
hour crossing a line a mile long; since they were flying from early 
morning till dark, it would mean that probably over a million and a 
half would cross such a line a day. As this was kept up for two or 
three weeks, you may imagine what a number of butterflies must have 
passed. I am sending you a small box containing a few that Mr. Faw- 
cett collected at that time. A few butterflies of apparently the same 
species are still around. 
Very truly yours, 
Ernst A. Bessey, 
Pathologist in Charge, Sub-tropical Laboratory. 
KEEPING A Loc.—I once read in the News, from the facile pen of 
Annie Trumbull Slosson, of how she worked an old log in Florida for 
insects, and what interesting captures she made. May 17, 1906, I 
found a small uprooted stump and log in a shady woods, alongside of 
a path. The decaying wood was damp and fungus-grown, and of a 
*Pieris monuste. 
