REPORT ON PARASITES. 
Dr. L. O. Howarp. 
The work on parasites and predatory enemies of the gipsy 
moth and brown-tail moth has continued along the same 
lines as during the previous year, except that no attempt 
has been made to import additional parasites this season. 
The material imported from Europe last year has been colonized 
and an effort has been made to determine the extent to which 
the species secured have established themselves in the field. 
Owing to the fact that one of the imported egg-parasites 
of the gipsy-moth, Anastatus bifasciatus, breeds very slowly, 
extensive collections were made during last winter of parasitized 
gipsy moth egg-clusters from colonies that were planted in 
previous years. From this material it has been possible to 
liberate 1,500,000 parasites of this species, and these have 
been placed in 1,500 colonies in sections where the insect had 
not become established. Eight hundred colonies were planted 
in towns along the western border of infestation, and the 
balance were liberated in a number of towns in the northern 
part of Massachusetts. During November of this year col- 
lections were made in New Hampshire in the colonies of Anas- 
tatus that were planted a year ago, and examination showed 
that these plantings were practically all successful although 
the spread has been slow. From these collections about 
100,000 parasitized eggs were secured and will be used for 
colonization in New Hampshire next spring. 
Investigations have shown that another egg-parasite of 
the gipsy moth, namely Schedius kuvane has become perfectly 
established in several colonies where it has previously been 
planted. During the past year there has been a decided 
increase in the abundance of this parasite, and in some cases 
it has spread nearly a mile and a half from the limits of its 
last year’s spread. The parasites attacking the caterpillars 
of the gipsy moth have been found more abundantly than 
during the previous year. 
Compsilura concinnata, a species of Tachinid fly, was 
very abundant during the summer of 1912, especially in the 
territory which was longest infested by the gipsy moth, and 
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