72 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 17 
employed and several trips were made from Budapest in search of a more 
favorable infestation in which to work, but without success until finally 
at Debrezcen, which is about 120 miles east of Budapest near the 
Roumanian frontier, a suitable infestation was located. Here arrange¬ 
ments were made to use a small building located on the edge of the 
forest for an insectary, and an order was placed for the making of a 
number of trays to be used in the rearing work. 
Having found an infestation in Hungary and knowing that a heavy 
infestation was present in Crimea, which we had been advised not to 
visit because of the unsettled conditions in that country, it was especially 
desired to visit the area between Hungary and Crimea. Accordingly 
Mr. Webber went to Roumania while the senior author travelled to 
Poland. Several infestations were found in Roumania by the junior 
author. In one infestation in Tinea, Calosoma sycophanta was very 
abundant and many of the large caterpillars carried Tachinid eggs. 
The cocoons of two species of Apanteles also were observed. Another 
location was visited at Comana where there had been a heavy infestation 
the year before and where parts of the forest had been stripped, but this 
year there were practically no egg clusters to be seen and only a light 
infestation was presenet. As the season was getting late, Mr. Webber 
returned to Debrezcen, Hungary, and stayed there for the remainder of 
the season. 
Two infestations were located in Poland, one at Lucks, which is near 
the eastern boundary, and one along the Vistula near Thorn in North¬ 
western Poland. Both of these infestations were very light and not 
suitable for securing parasites in appreciable numbers, and the senior 
writer returned to Debrezcen. 
The forest at Debrezcen covers an area of several square miles, 
much of which is a solid stand of locust, Robinia Pseudo-acacia L., 
but which has smaller areas of mixed growth consisting of oak, Quercus 
pedunculata Willd., locust, Populus and Salix. In the mixed growth 
areas the oak predominates. The area was not a solid forest stand, but 
was broken with small clearings and vegetable gardens scattered through 
it, quite similar to areas in southern Massachusetts, except for the solid 
stand of locust. There was considerable undergrowth and a good 
variety of lepidopterous larvae present. The gipsy moth infestation 
was of medium density and was in the mixed growth. 
A number of school boys were employed and daily collections of 
gipsy moth larvae were made. These larvae were placed in trays at the 
insectarv where they were fed until the parasite maggots issued. As 
