Acknowledgments 



Grateful acknowledgment is made to the many individuals who 

 have contributed to these studies. So many have cooperated over 

 the years in collecting, rearing, and identifying the various species 

 that complete acknowledgment of all contributors is impossible. 



However, particular credit should be given to the following: the 

 late A. F. Burgess, who organized and encouraged this project; the 

 late C. W. Collins, who was in charge of the former Bureau of Ento- 

 mology and Plant Quarantine laboratory at Melrose Highlands, Mass., 

 and under whose general direction much of the work was performed; 

 R. C. Brown, now chief of the Division of Forest Insect Research, 

 Northeastern Forest Experiment Station, for his interest and en- 

 couragement in the preparation of this publication; Charles L. Gris- 

 wold, for his keen interest and assistance in the collecting and rearing 

 work for several years at Melrose Highlands, and especially for prepa- 

 ration of many fine specimens for the museum collection; M. T. 

 Smulyan, who assisted at Melrose Highlands for 1 year and con- 

 ducted the rearing work in New Jersey for 2 years; the late R. T. 

 Webber, who did some of the early rearing work and who was re- 

 sponsible for identification of most of the Diptera; P. B. Dowden for 

 identification of much of the hymenopterous parasitic material; and 

 W. F. Sellers for determination of som.e of the dipterous parasites. 



Special acknowledgment is made to C. F. W. Muesebeck, former 

 chief (retired) of the Division of Insect Identification, Agricultural 

 Research Service; and to members of his staff for determination or 

 verification of most species reared. The staff described and named 

 most new species of parasitic Hymenoptera reared in the course of 

 these studies. 



Mi 



