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 their foliage. 

 The splendid pines of the Lausitz Mountains are this year threat- 

 ened with destruction. Newspaper. 



DR. C. L. MARLATT, Bureau of Entomology, United States Department 



of Agriculture, Washington, D. C. 



DEAR DR. MARLATT: 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 LOG. 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. 



