ap bps 
of 18 additional colonies. A total of 28 subcolonies in all have been 
released from the parent colony. A recent check-up of the points where 
colonies of this insect were set free in 1927 revealed the fact that the 
10 subcolonies are all well established. 
Conditions in the central portion of the area heavily infested by 
the Japanese beetle indicate a slight reduction in the population of the 
beetle, as compared with conditions during the last four or five years: 
Foreign visitors in August at the headquarters of the work on the 
Japanese beetle, at Moorestown, N. J., included J. C. F. Fryer, oui 
Ministry of Agriculture, and Dr. A. D. Imms, of the Rothamstead Experi- 
ment Station, Harpenden, Herts, England; Dr. Bernard Trouvelot, Institut 
des Recherches Agronomiques, Paris, France; Dr. Filippo Silvestri, Regio 
Instituto Superiore d'Agricoltura, Portici, Italy; Dr. Martin Schwartz, 
Director Biologische Reichsanstalt fiir Land- und Forstwirtschaft, Berlin- 
Dahlem, and Dr. K. W. Baunacke, Abteilung fiir Pflanzenschutz der Stat— 
lichen Landwirtschaftlichen Versuchsanstalt, Dresden, Germany; Dr. Jar— 
omir Samal, of the University of Prague, Czecho-Slovakia; and Dr. Karl 
Knechtl, Zoological Laboratory, University, Bucharest, Rumania. From 
Ontario were C. S. Thompson, of the Ontario Department of Agriculture, 
and A. B. Baird, of the Entomological Branch, both from Chatham. Visi-— 
tors from the United States included S. M. Dohanian and D. W. Jones, of 
the laboratory for corn-borer research at Arlington, Mass., Mr. and Mrs. 
B. D. Van Buren, Department of Agriculture and Markets, Albany, N. Y., 
Don C. Mote, of the State Agricultural Experiment Station, Corvallis, 
Oreg., S. E. Flanders, Saticoy, Calif., and 0. H. Swezey, Honocuias 
Hawaii. 
Members of the Fourth International Congress of Entomology made 
an official trip to the headquarters of the work on the Japanese beetle, 
at Moorestown, N. J., Monday, August 27. Upon arriving at the laboratory 
the guests were shown informally the work in progress under the several 
projects. Especial interest was shown in the constant-temperature ap-— 
paratus used in connection with the studies of soil insecticides. Two 
hot-water baths were in operation, each having a capacity of 300 gallons, 
and arranged for automatically maintaining constant temperatures. Of 
particular interest also were a vacuum and pressure tank used in studying 
problems relating to fumigation, chemical laboratories for special prob— 
lems, the parasite cellars, where the temperatures and the humidity are 
made to correspond to the temperatures and moisture of the soil, elegtri— 
cal traps, and other equipment. Unfortunately, the delegates had to en= 
train for New York shortly after noon, and it was therefore impossible 
for them to spend more than a very brief time on any particular phase of 
the work. About 32 delegates were present. Those who registered from 
abroad included Dr. Bledowski, of Poland, Dr. Vayssiere and Dr. Regnier, 
of France, Dr. Stellwaag and Dr. Skwarra, of Germany, Dr. G. Fox Wilson, 
of England, Dr. N. A. Kemner, of Sweden, Dr. Streda, of Hungary, Dr. 
Damph, of Mexico, Dr. Efflataun, of Egypt, Dr. Thomsen, of Denmark, Dr. 
-Roepke, of Holland, Dr. N. M. Rimsky-Korsakov and Dr. Saitzev, of Russia, 
