. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PARASITES HIBERNATING IN BROWN-TAIL WEBS. 279 tion of hibernating nests in the spring of 1907 they were placed in these cages and fed. As a result of his enforced absence from the laboratory at a critical period these cages lacked the proper atten- tion, and things went wrong with many of them. A few, however, were measurably successful, and eventually about 1,000 of the Apanteles were reared and colonized. Meteorus was discovered to have similar hibernating habits, and Zygobothria was also reared under circumsta
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PARASITES HIBERNATING IN BROWN-TAIL WEBS. 279 tion of hibernating nests in the spring of 1907 they were placed in these cages and fed. As a result of his enforced absence from the laboratory at a critical period these cages lacked the proper atten- tion, and things went wrong with many of them. A few, however, were measurably successful, and eventually about 1,000 of the Apanteles were reared and colonized. Meteorus was discovered to have similar hibernating habits, and Zygobothria was also reared under circumstances which were sufficient to indicate its hibernating habits to the satisfaction of the junior author of this bulletin, but not to that of the senior. The Apanteles, in accordance with what was then the policy of the laboratory with regard to parasite coloniza- tion, were liberated in no less than three widely separated localities. None of the colonies, so far as known, was successful. As anyone who was unfortu- nate enough to be associated with the laboratory during the spring and summer of 1907 will undoubtedly be willing to testify, the discomfort caused by handling quantities of caterpil- lars and cocoons of the brown- tail moth was literally dread- ful. The poisonous spines upon the young caterpillars are neither so abundant nor so viru- lent as those upon the older caterpillars, but they are bad enough, and the task of feeding the inmates of the numerous cages which contained some thousands was a task of no little magnitude and one involving much physical discomfort. The instant the door of one of these cages was opened, if the day was warm and its occupants active, a variable, but usually a large number would crawl outside, and to attempt to brush them back was but to afford op- portunity for more to escape. Consequently thousands did escape and had to be brushed up and destroyed after each day's feeding. To keep the cages clear of debris was well-nigh out of the questi
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