Technical Series No. 19. 



U. S. DEPARTMENT OF AGRICULTURE. 



BTJRE!A.XJ OF K3SrTOM:OIL.OG-Y. 



L. O. HOWARD. Entomologist and Chief of Bureau. 



TECHNICAL RESULTS FROM THE GIPSY 

 MOTH PARASITE LABORATORY. 



I. THE PARASITES REARED OR SUPPOSED TO HAVE BEEN REARED 

 FROM THE EGGS OF THE GIPSY MOTH. 



By L. O. HOWARD, Ph. D. 



II. DESCRIPTIONS OF CERTAIN CHALCIDOID PARASITES. 



By J. C. CRAWFORD, Assistant Curator, Division of Insects, United States National Museum. 



III. INVESTIGATIONS INTO THE HABITS OF CERTAIN SARCOPHAGID^. 



By T. L. PATTERSON, Assistant in Biology, Sheffield Scientific School, Yale University 



WITH AN INTRODUCTION 



By W. F. FISKE, In Charge of Gipsy Moth Parasite Laboratory, Bureau of Entomology. 



IV. THE CHALCIDOID GENUS PERILAMPUS AND ITS RELATIONS TO 

 THE PROBLEM OF PARASITE INTRODUCTION. 



By HARRY S. SMITH, Expert. 



V. EXPERIMENTAL PARASITISM: A STUDY OF THE BIOLOGY OF 

 LIMNERIUM VALIDUM (CRESSON). 



By P. H. TIMBERLAKE, A. M., Agent and Expert, Gipsy Moth Parasite Laboratory. 



WASHINGTON : 



noVKRNMENT PRINTING OFFICE. 



1916. 



