Contents xxvii 



PAGE 



A Method of Breeding Some Defoliators ... . 486 



By S. A. Graham, University of Michigan 



Technique of Culturing Habrobracon juglandis 489 



By P. W. Whiting, University of Pennsylvania 



Rearing Chelonus annulipes 49 1 



By Arlo M. Vance, U. S. Bureau of Entomology and Plant Quarantine 



Rearing Apanteles thompsoni 49 2 



By Arlo M. Vance, U. S. Bureau of Entomology and Plant Quarantine 



Methods of Producing Macrocentrus ancylivorus in Large 



Numbers for Colonization in Peach Orchards .... 493 

 By Phhip Garman, Connecticut Agricultural Experiment Station 



Rearing of Aphidiinae -495 



By Esther W. Wheeler, University of North Dakota 



Hymenopterous Parasites of Gyrinidae (Abstracted) . . . 496 

 By F. Gray Butcher, North Dakota College of Agriculture 



Rearing Paniscus . . . . , 497 



By Arlo M. Vance, U. S. Bureau of Entomology and Plant Quarantine 



Culture of Habrocytus cerealellae, a Parasite of the Angoumois 



Grain Moth 497 



By B. B. Fulton, North Carolina State College 



Breeding a Primary Parasite and Two Hyperparasites of the 



Geranium Aphid 499 



By Grace H. Griswold, Cornell University 



Production of Trichogramma S 00 



By Stanley E. Flanders, University of California 



Methods for Rearing Tiphiids and Scoliids 502 



By J. L. King, U. S. Bureau of Entomology and Plant Quarantine 



Laboratory Maintenance and Care of the Mound-Building Ant, 



Formica ulkei 508 



By A. M. Holmquist, St. Olaf College, Northfield, Minnesota 



Some Aids to the Study of Mound-Building Ants . . . .510 

 By E. A. Andrews, Johns Hopkins University 



