. Bulletin of the Department of Agriculture. Agriculture. BULLETIN No. 766 Contribution from the Bureau of Entomology L. O. Howard, Chief. Washington, D. C. PROFESSIONAL PAPER July 10,1919 A STUDY OF COMPSILURA CONCINNATA, AN IM- PORTED TACHINID PARASITE OF THE GIPSY MOTH AND THE BROWN-TAIL MOTH. By Julian J. Culver,1 Entomological Assistant, Gipsy Moth and Brown-tail Moth Investigations. CONTENTS. Page. Introduction 1 History of Compsilura concinnala Meigen 3 Description 3 Distribution in Europe 4 Hosts, European and American 5 Importations to United States 6 Colonization 6 Spread 7 Reco
. Bulletin of the Department of Agriculture. Agriculture. BULLETIN No. 766 Contribution from the Bureau of Entomology L. O. Howard, Chief. Washington, D. C. PROFESSIONAL PAPER July 10,1919 A STUDY OF COMPSILURA CONCINNATA, AN IM- PORTED TACHINID PARASITE OF THE GIPSY MOTH AND THE BROWN-TAIL MOTH. By Julian J. Culver,1 Entomological Assistant, Gipsy Moth and Brown-tail Moth Investigations. CONTENTS. Page. Introduction 1 History of Compsilura concinnala Meigen 3 Description 3 Distribution in Europe 4 Hosts, European and American 5 Importations to United States 6 Colonization 6 Spread 7 Recovery 7 Discussion of classification of Compsilura con- cinnata 9 Discussion of larva stage of Compsilura concin- nata 10 Life history 13 Method of handling 13 Larva and pupa stages 15 Adult stage 16 Gestation 16 Life history—Continued. Parthenogenesis 16 Copulation 17 Larviposition 17 Action on hosts other than the gipsy and brown-tail moths 18 Effect of temperature upon various stages of Compsilura concinnala 19 Seasonal history 20 Presence in field and number of genera- tions 20 Hibernation 21 Secondary parasitism 23 Supcrparasitism 23 Supernumerary 24 Economic importance 24 Bibliography 26 INTRODUCTION. Compsilura concinnata Meigen (PI. I, fig. 1), one of the imported tachinid parasites of the gipsy moth and the brown-tail moth, was introduced into Massachusetts first in 1906, at which time these moths were so abundant and destructive, particularly in eastern Massachu- 1 The writer wishes to express his appreciation of the help given by the various as- sistants at the Gipsy Moth Laboratory as well as by the field men, both at the labora- tory and in collecting host material ; to Mr. A. F. Burgess and Dr. John N. Summers for their helpful suggestions and advice ; to Mr. R. T. Webber for furnishing rearing records, the bulk of the native host list being the results of his experiments ; to Mr. C. F. Muese- beck for assisting in the dissections and drawings of som
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