i^'. 



Technical Series, No. 19. Part IV. 



U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF E:TsrT0M:02L,0G-Y. 



L. 0. HOWARD, Entomologist and Chief of Bureau. 



TECHNICAL RESULTS FROM THE GIPSY MOTH 

 PARASITE LABORATORY. 



IV. THE CHALCIDOID GENUS PERILAMPUS AND 



ITS RELATIONS TO THE PROBLEM OF 



PARASITE INTRODUCTION. 



By HARRY S. SMITH. 



Expert. 



Issued Apkil 22, 1912. 



ZZ\SZi 



WASHINGTON: 

 GOVERNMENT PRINTING OFFICE. 



3;ji2. 



