MONOGRAPH OF THE NEARCTIC HYMENOPTERA OF THE 

 GENUS BRACON FABRICIUS. 



By Harold Morrison, 



Of the Federal Horticultural Board, Washington, D. C. 



INTRODUCTION. 



The following paper gives the results of a portion of the work done 

 on a collection of insects of the subfamily Agathmae of the family 

 Braconidae. Under the existing circumstances it has not been found 

 possible to go over the whole of the collection, nor to put into com- 

 pleted form more than the monographic classification of this one 

 genus. The collection from which specimens were examhied was 

 obtained from the following sources, mostly through the kindness of 

 Prof. J. C. Bradley of Cornell University, under whose direction the 

 work was started; the greatest number came from the United States 

 National Museum, about 1,000 specimens belonging to this subfamily 

 being obtained there; the next largest collection came from the Acad- 

 emy of Natural Sciences at Philadelphia, but unfortunately none of 

 these have been available for final examination. In addition, speci- 

 mens were obtained from the Cornell University collection, the Ameri- 

 can Museum of Natural History, Prof. C. T. Brucs of Bussey Institu- 

 tion, Mr. C. W. Jolmson of the Boston Society of Natural History, 

 Mr. W. M. Mann of Bussey Institution, and Mr. Nathan Banks. 



In addition to expressing my appreciation of the kindness of the 

 United States National Museum authorities in charge of the insect 

 collections and of the above-mentioned gentlemen, I also wish to 

 thank Professor Bradley for many suggestions during the early part 

 of the work which was started at Cornell University, Dr. Henry 

 Skinner for permission to examme the Cresson types in the Academy 

 of Natural Sciences in Pliiladelpliia, and Prof. V. L. Kellogg for many 

 ideas regarding the basis upon which species limits should be deter- 

 mined. The drawmgs accompanying the paj)er were made by Mr. 

 C. H. Kennedy. Most of the work was done in the entomological 

 laboratory of Stanford University. 



Proceedings U. S. National Museum, Vol. 52— No. 2178. 

 65008°— Proc.N.M.vol.52— 17— 20 305 



