may yo 
Imported parasite of gipsy moth established at Wilmington, Mass.— 
R. C. Brown, Melrose Highlands, Mass., reports that Phorocera agilis R. 
D. has been recovered at Wilmington, indicating "a spread of several 
miles either from Boxford, Mass., or from colonies liberated in Chelms— 
ford, Mass., in 1929. This tachinid fly 1s an important parasite ofmine 
gipsy moth in Europe and has been liberated in considerable numbers in 
New England. Whether or not it will become an effective parasite in this 
region remains to be seen. At present it can only be stated thatuateee 
established." 
Control of beech scale.--S. F. Potts, Melrose Highlands, states 
that "100 per cent kill of the beech scale (Cryptococcus fagi Baer) was 
obtained by vacuum fumigation with hydrocyanic acid gas at dosages as 
low as 1/8 ounce to 100 cubic feet at temperatures ranging from 45° to 
84° F. A commercial mixture of ethylene oxide and carbon dioxide at 
the rate of 1 pound per 100 cubic feet at 45° F. gave 100 percent kill 
of the scale. Lower dosages and lower temperatures were not tried." 
Trapping elm leaf beetle.—-Experiments by R. C. Brown and J. E. R. 
Holbrook, Melrose Highlands, in trapping Galerucella xanthomelaena Schr. 
are reported as follows: "This year isolated farm buildings in Woburn, 
Mass., were selected for our experiments. Two large elms that were 
heavily infested in 1932 overshadow the barn. On May 4 tanglefooted 
cellophane traps were placed in the windows at each end of the barn loft. 
A few beetles were observed on the windows on that date. On May 16 
several thousand beetles were already on the tanglefoot traps. On May 
eo the trapS were removed. A total of 23,951 beetles were caught on 
the two traps. Very few beetles were observed in the house. It is be— 
lieved that a high percentage of the adults passed the winter in the 
loft and it is also thought that a sufficient number may have been 
caught to materially reduce the infestation. Such a trap is simple in 
construction, easy to install, and may be an effective control measure, 
especially where an infestation occurs near isolated buildings." 
CEREAL AND FORAGE INSECTS 
Many range caterpillar eggs found to be sterile.--J. C. Franken— 
feld, Raton, N. Mex., reports that "from 50 to 100 percent of range 
caterpillar eggs are sterile, varying in different localities in New 
Mexico. Some entire egg masses are composed of sterile eggs, indicat— 
ing a lack of mating by the depositing female. In other masses scat— 
tering eggs are fertile and contain fully developed embryos on this 
date (May 24), showing that while mating had occurred it apparently 
had not been complete. Sterile range caterpillar eggs have a charac-— 
teristic green tinge, which is unmistakable. These, when freshly de— 
————— SS 
do not develop. Later on, the contents of these sterile eggs turn to 
an amber color, and still later to brown, at which stage the eggs are 
